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Magnitude

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From the #1 New York Times bestselling author of Iceberg and The Free State of Jax comes the harrowing story of the fight for survival during the Great San Francisco Earthquake of 1906 and the desperate race to find survivors.San Francisco, 1906.When Cora leaves her house in the early morning hours of April 18th, she expects trouble to find her, like it somehow always does. But as she makes her way to the San Francisco docks to look for her father, the earth begins to shake and suddenly, Cora realizes that she's not just in trouble--she's in danger.Soon after, the last thing Cora remembers seeing is a tall building swaying overhead, before everything goes dark.When Cora wakes up, she's trapped underground with Chi, whom she met by accident on the way to the docks. They're running short on air and time, when miraculously, Cora's friend Oliver pulls them from the rubble. Once she's above ground again, Cora is shocked to find herself in a city that has been decimated by a massive earthquake.Together, Cora, Chi, and Oliver begin a desperate search for their families, all the while trying to evade terrifying fires that are tearing through the wreckage and a gang of thieves who are pursuing Cora and a valuable secret she holds.From beloved #1 New York Times bestselling author Jennifer A. Nielsen comes a thrilling, suspenseful story about courage, friendship, and the strength it takes to survive one of the most terrible natural disasters this country has ever seen.

274 pages, Kindle Edition

First published March 3, 2026

105 people are currently reading
3887 people want to read

About the author

Jennifer A. Nielsen

52 books9,910 followers
Jennifer lives at the base of a very tall mountain in Northern Utah with her husband, three children, and a naughty puppy. She loves the smell of rainy days, hot chocolate, and old books, preferably all at once. She is a former speech teacher, theater director, and enjoyed a brief but disastrous career as a door-to-door pollster. In her spare time, Jennifer tends to panic, wondering what she has forgotten to do that has allowed her any spare time.

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Displaying 1 - 30 of 81 reviews
Profile Image for TL *Humaning the Best She Can*.
2,403 reviews173 followers
March 9, 2026
She's really good at making her characters and settings come alive and feel like you could reach out and touch them and step outside the door and see everything they see.

I can't imagine the fear and the chaos during and after this huge event 💔😢. So many losing everything and some happily finding each other.

And others taking advantage to loot from the rubble 😠.

But there was also brave,kind, and selfless people as well.

It's amazing the city was able to be rebuilt.. would love to read fiction and nonfiction books about rebuilding after the earthquake.
Profile Image for BooksNCrannies.
271 reviews134 followers
April 17, 2026
"The ground beneath my feet began rumbling....
The rumbling came with a low growl somewhere deep below [me], almost as if a giant had been snoring and was beginning to awaken.
But this was no made-up story of giants. This was an earthquake....
And I quickly realized the earthquake was only just the beginning."


✏️ Review ✏️

One of my favorite things about Jennifer A. Nielsen's historical fiction stories is the way in which Nielsen presents the facts and events of history in an educational and engaging manner. Magnitude is no exception. Recounting the horrific events of the Great San Francisco Earthquake of 1906, Magnitude brings readers on an unpredictable escapade through the burning streets of destruction-ridden San Francisco. This story brings the uncertainty, panic, and devastation of that day tactfully into the hands of readers who are eager to find out what happens next.

The plot's pacing and delivery is handled well. I will submit that certainly not every part of the plot maintained a gripping or satisfactory pace, but I must say that I found the storyline of Magnitude to be a bit better than some of Nielsen's other historical fiction stories both in terms of believability and intrigue. The historical magnitude of the 1906 earthquake is combined with character dilemmas and conflicts that blend seamlessly with the storyline to produce realistic suspense and uncertainty.

Streamlined, straightforward, yet descriptive in its own way — these are the typical characteristics of Nielsen's writing style. It's somehow effortlessly enjoyable while maintaining easy navigation without superfluous encumbrances. After reading almost all of Jennifer A. Nielsen's books over the past two years, I've learned to expect no more or no less from Nielsen's writing style; in fact, I've come to rather enjoy her writing style as it gets right down to the business of the story at hand and makes for effortless reading. And although it's arguably more simplistic, the writing style still performs a splendid job at delivering the atmosphere, emotions, and action depicted in Magnitude.

Both of the MCs feature satisfying development and character depth fueled mostly by a connected backstory of a broken friendship. I liked the characters' distinct personalities, their strengths and weaknesses, and the role they each play in this story. Cora and Oliver compliment each other and the story well; Chi adds more positive character qualities while also allowing for pertinent historical insight about the wrongful prejudices against the Chinese community in early 1900s San Francisco.

Perhaps my second favorite thing about Jennifer A. Nielsen's stories, particularly her historical ones, are the important themes which are metaphorically woven throughout the storyline. With its emphasis on an earthquake and the following destruction and aftershocks, Magnitude is creatively infused with observable themes based on these real-life aspects. Just as an earthquake will split the ground and destroy buildings, so too will arguments and jealousy begin an unmerciful earthquake that will split and destroy friendships. Reconciliation of such broken friendships is possible. But only if each friend is unconditionally committed to navigating and supporting each other as they rebuild amidst the subsequent rubble and aftershocks of such an earthquake in their friendship.... Two thumbs up for the themes!

Nielsen understands the balance of crafting exciting and educational MG/teen historical fiction: blending the historical facts and events with an engaging storyline. And I must admit that I learned more — quite a bit more actually — about the Great San Francisco Earthquake by reading Magnitude than from any of my history classes.

"April 18, 1906, the day of the great earthquake....
Four hundred thousand people were living in San Francisco at the time, and every one of them was touched by it in some way. For a few, it was an inconvenience. For some, it was a loss. And for the great majority of people, it was devastating.
Yet for me, it was only the beginning of an enormous wave that would continue to crash in the hours that followed....
Because there are some things more terrible than a 7.9-magnitude earthquake. As awful as those forty-five seconds of shaking were, I was about to find out if I could hold on when the waves that followed would prove to the the greatest challenge of my life."


While Magnitude delivers an educational narrative about the 1906 Great San Francisco Earthquake, it also poignantly illustrates the symbolic earthquakes and their subsequent destruction we all face in our own lives... and the joy and satisfaction that comes from determining to overcome these earthquakes by rebuilding together with the help and support of our community, family, and friends.

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📊 A Quick Overview 📊

👍🏼 What I Liked:
• A good portion of the plot — while it isn't stellar, it's still engaging and realistic.
• The seamless presentation of the historical facts within the storyline.
• The MCs — they do receive some development throughout the story and compliment the story satisfyingly.
• The incorporation of positive themes.

👎🏼 What I Did Not Like:
• A few parts of the plot were slower and not as gripping.

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To Read or Not To Read?

Would I recommend this book? Of course.*

To whom? To those who enjoy middle grade/teen historical fiction stories that have a mix of slow and exciting moments.

*(Note: I leave it up to each individual to decide the maturity and discernment level required to read the books I recommend, based on my content warnings below [in my Book Breakdown]. My content warnings [if any] should always be considered alongside my recommendations when deciding who these books are best suited for.)

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📖 BOOK BREAKDOWN 📖 (Overall: 3.75/5 [rounded up to 4 on Goodreads])
~Fundamentals: (1=worst; 5=best)
— 📈 Plot: 3.5/5
— 📝 Writing: 3/5
— 👥 Characters: 3.5/5

~Content: (0=none; 1=least; 5=most)

— 🤬 Language: 0/5

— ⚔️ Violence: 0/5

— ⚠️ Sexual: 0/5

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📣 Random Comments 📣

Content note Astrology, horoscope predictions, and zodiac birth signs (i.e., Capricorn, Sagittarius, etc.) are briefly touched on and mentioned on sporadic occasions throughout Magnitude. Details and references are minimal and the story's attitude towards this topic is negative, as the FMC agrees that astrology doesn't work and is "not scientific." While Magnitude does not endorse or promote astrology, you should be aware of the topic's presence in this book when deciding if Magnitude is suitable for younger readers.

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💬 Favorite Quotes 💬

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Profile Image for Rebecca.
4,496 reviews69 followers
September 7, 2025
Writing about a disaster requires a special set of writing skills, foremost among them the dual ability to make the characters have a stake that's not entirely related to the disaster itself. Nielsen did this beautifully in her book Iceberg (about the Titanic), but it doesn't quite work as well here. In large part, this is because we simply don't get quite enough information about the Great San Francisco Earthquake of 1906. There are headings at the start of each chapter charting first the quake and then the progress of the fires, and bits of information about the way the Chinese community was treated and the corrupt city government are present, but they don't intertwine with Cora's story quite as well as they might have - and the historical note in the back doesn't really give readers any resources or additional information.

Still, the basic story and writing are good. Nielsen does a solid job of depicting Cora's moral dilemmas and if the plot about the rift between her family and her best friend Oliver's isn't as developed as it could be, it's still a good backdrop for the other issues she faces. Chi is the least developed character in the book, and since she's also the only nonwhite character, that's a problem; I really would have liked to see a bit more go into her other than "People in 1906 learn that Asians are human too."

I think I would still recommend Outrun the Moon to a middle grade audience looking for a book about the earthquake, but that doesn't mean that this one isn't worth reading. Rather it's the book you pick up when you already know the basic history and want a story in that time and place, not the one you pick up to learn about it in the first place.
127 reviews2 followers
April 2, 2026
I love Jennifer Nielsen’s books. This one didn’t disappoint! The intensity of these three teenagers strive to survive an earthquake while finding their families. So much action and excitement. I also didn’t know a lot about the San Francisco earthquake. She is a master at bringing her research into her historical fiction books. Excellent read!
Profile Image for Avi.
13 reviews
March 11, 2026
I'd say 2.5 stars. There were some parts I liked and others that did not seem realistic at all...
Profile Image for Sheri.
304 reviews9 followers
April 26, 2026
3.5 stars. This was an entertaining and adventurous middle grade historical fiction. While it did take place during San Francisco's great earthquake, I felt that most of the novel focused on friendship and the main character's moral decisions. With that said, I breezed through this book trying to discover what happened next and learned several facts about San Francisco and the earthquake that I didn't know previously. Thank you to the author, publisher and NetGalley for the digital ARC.
Profile Image for Marinda (rindasreads).
531 reviews33 followers
January 15, 2026
Jennifer A. Nielsen has done it again--taken me to a historical setting I know only a little about and plopped me into the middle of an action-packed adventure with high stakes and lovable characters. Cora, Chi, and Oliver felt like family by the time I finished reading about their story, which takes place during the Great San Francisco Earthquake in 1906.

This is one of those stories that has you cringing at the character's choices, were you think things can't possibly get worse and then they do, but somehow it all turns out okay. Choices are made with real consequences--both good and bad. I love that I can hand this novel to my children and know they're getting a dose of history along with ethics.

Thank you to NetGalley and the Publisher for sending me an advanced ecopy to review! All opinions are my own.
Profile Image for Wendy.
47 reviews7 followers
September 19, 2025
Thank you to Netgalley for giving me a ARC of this book. This was my very first Jennifer A. Nielsen book and I flew through it. I really enjoyed the nonstop plot, the chaos our main character deals with throughout and how everything is resolved. I truly enjoyed how the author how all people are important and how they all share in the destruction and the shock of the earthquake too. I am looking forward to adding more books from this author on my TBR. Great read!
Profile Image for Isabelle Knight.
Author 7 books12 followers
March 28, 2026
This is undoubtedly one of the most memorable reads of this month.

To be honest, I had a very hard time getting into the book and so I put off reading it for a long time. And while I'm still not entirely certain I'm the right reader for the book, I did push on and soon found myself utterly invested. The story is incredibly fast-paced, with a lot of disasters and plot threads throughout, and Jennifer A. Nielsen's writing is so vivid and descriptive. I don't know too much about the San Francisco fire and earthquake in 1906, so I found it quite interesting to read about.

The way everything is woven together in the book is brilliant, and I loved the friendships and characters!! Chi is my favorite character, as she is just such a sweet person and a brilliant friend. I also loved seeing Oliver and Cora's relationship grow in this book!

The only qualms I have over this book (which is not at all a bad thing and is honestly to be expected, seeing as the book literally takes place during the San Francisco fire in 1906. But it is the main reason I don't think I'm quite the right reader for this book.), is how it often feels like it just lurches from disaster to disaster throughout the story. It is definitely very gritty and action-packed, and I just don't think I'm the best reader for those kinds of novels. I'm very much someone who prefers sweet, whimsical MG fantasy stories.

But that being said, I still enjoyed reading this book and I do think it is a brilliant, well-written novel. I would definitely recommend it to a lot of my friends, as well as middle-grade readers who enjoy action-packed books. Five out of five stars from me.
Profile Image for Naomi Raboin.
27 reviews
Did Not Finish
March 28, 2026
I was so excited for this book to come out! I finally got it from the library and within the first few pages the MC was talking about horoscopes, betting how she was going to survive on which horoscopes she was, and other things. I can tolerate one mention of horoscopes in the entire book, but I was like 10 pages in and she had already mentioned them about 10 times. I was very disappointed that Nielsen included this, and chose not to finish this book.
Profile Image for Adrienne.
2,092 reviews16 followers
Review of advance copy received from Netgalley
February 15, 2026
This book has a lot going on--Cora, Zhi, and Oliver all dealing with the earthquake and looking for/worrying about their families; Cora trying to get away from a couple of gang members who she owes money to, Cora and Oliver trying to sort out their friendship when their families are at odds, etc.--and it didn't all come together quite as cleanly as I would've liked. I really liked the historical details woven into the story--from the way the fire was handled (such as dynamiting building to try to create firebreaks and the prejudices against the people in Chinatown), but I felt like the whole element with Cora owing money to some boys who are constantly trying to track her down fell a little flat; the villains were just stock characters and that whole plot element didn't add that much to the book; I think it could have been removed and the book wouldn't really have lost anything because the other elements could have been developed more and made a cohesive, engaging story. That said, I will definitely still be snagging this for my kids to read because I'm sure they'll enjoy the story and the historical details.

I read a DRC provided by the publisher via NetGalley. All opinions are my own.
Profile Image for Becky.
6,246 reviews314 followers
April 21, 2026
First sentence: The first time I felt an earthquake, I was nine years old.

Premise/plot: Magnitude is middle grade historical fiction set in San Francisco, 1906. Cora, Oliver, and Chi are unlikely friends brought together by circumstance. Cora and Oliver were once the closest of close friends until their parents quarreled. Cora and Chi were strangers when the story opens. But being at the same place when the earthquake hit brought them together--when the road collapsed they fell underground and were trapped together. Oliver 'rescues' them both. But that's not the end of their adventures.

My thoughts: I wanted to like this book. I did not like this book. Why didn't I like this book? I felt almost all the characters lacked common sense. I truly did. Granted middle grade novels are typically centered on kids being independent and not relying on adults even in adult situations. Parents are usually 'absent' from the plot or poorly drawn and flat. But in this one, the three friends make unwise decisions one hundred percent of the time. Run away from danger? Run towards parents? NO. Run towards danger? Run toward fires? Yes. Run toward exploding buildings? Yes. Accept the guidance of any and every adult they come across? NO. Do whatever they want despite being warned eight million times? YES. Adults are bad. Surely they are smarter than ANY and EVERY adult. Because they think they always know best, they do find themselves in trouble. And I'm not really blaming Chi--she was just dragged into this story. But because they are the heroes of the book, they have a tied up in a neat bow ending.

You might think you're getting a book about survival, a desperate search to find family, a tale of perseverance against all odds. What you are getting is a story about corruption and greed. Cora took out a loan from a shady, shady guy. When the loan is due, Cora still doesn't have the money. The earthquake happens. The bad shady guys are after her. It's a cat-and-mouse game. The earthquake is not important in the slightest. It's just a girl and her friends being chased by "bad guys" who want the money paid back from the loan. All the characters seem more focused on this loan and money situation than the dangers of the earthquake--the fires, the explosions, being hungry and thirsty, being separated from family, being vulnerable and all.
Profile Image for Teagan.
10 reviews
Review of advance copy received from Netgalley
February 8, 2026
Magnitude

Author: Jennifer A. Nielsen

Category: Middle grade, Historical fiction, Young Adult

Cupcake Rating: 🧁🧁🧁🧁🧁

Magnitude is scheduled to be published on March 3, 2026

Magnitude is a historical fiction chapter book. Magnitude tells a story about a girl named Cora and her family in the early 1900's that experience the Great San Francisco earthquake. Cora's family was very poor, due to their gold mine shutting down. So Cora's dad had to sail away from San Francisco to find a better job. Every morning Cora would walk to the dock to see if her dad was home... she couldn't give up. One day while she was walking to the dock an unexpected earthquake started. This earthquake was like nothing she had dealt with before. When a building falls on her and she is trapped she needs to find a way out. Will she survive? Will she find her family? Will her friends be safe? Netgalley sent me this book early for review purposes and I was very excited. Thank you Netgalley! I had just read A Night Divided and loved it, and when I received Magnitude, I was in the middle of reading Iceberg by the same author. Magnitude is a very detailed and INTENSE book, I loved it so much that I read it in two days. Every page has a new and interesting thing happening. Magnitude has good character development and the plotline kept me on the edge of my seat at all times! The book is intense, but not gory and it is totally clean. A good book for those who love to read mid grade novels. I think everyone should read this book! Grab a copy for yourself and enjoy the ride! I give this book a 🧁🧁🧁🧁🧁 review, IT WAS AMAZING!

Profile Image for Erlene.
59 reviews
February 17, 2026
I recently finished Magnitude by Jennifer A. Nielsen, and it was such a powerful read. I really appreciate how she brings different historical events and time periods to life in a way that feels real and personal. This one is set during the Great San Francisco Earthquake of 1906, and you can truly feel the chaos and fear through Cora’s eyes. Cora is the kind of main character who is always finding (or getting into!) trouble, but that’s what makes her so compelling. She’s brave, stubborn, and constantly learning who she can trust. One part that really stood out to me was the mention of the “special police.” Since they wore regular clothes, you couldn’t always tell if someone was pretending to have authority, which honestly reminded me of some modern issues with ICE and how complicated enforcement and identity can feel today.

The book doesn’t shy away from showing how awful people can become during disasters, especially when corruption and fear take over. It also touches on racism in the Chinatown area and the unfair assumptions people made during that time. At the same time, the story beautifully explores friendship: the complexities of it and the incredible power it has even in the hardest moments. Perseverance is a strong theme throughout, as Cora keeps pushing forward no matter what’s thrown at her. It’s a great mix of action, history, and heart. It’s a great read, and I definitely recommend it. I will be purchasing it for my school library.
86 reviews2 followers
September 23, 2025
Magnitude by Jennifer A. Nielsen (Mar 3, 2026)
ARC provided by NetGalley

Jennifer A. Nielsen takes readers back to April 1906, San Francisco, on the eve of the devastating earthquake. Cora lives with her mother and siblings in crowded tenements, anxiously awaiting the return of her father, who left to find work after the family gold mine closed. On her way to the pier in hopes of spotting him, Cora encounters Chi (Zhi), who is fighting to keep hold of her bicycle from Vincent and Tony Jr.—two boys Cora knows all too well.

Cora steps in to help, and together she and Chi escape—only for the earth to suddenly split beneath them. The girls plunge into a crevice as buildings collapse around them. They’re later rescued by Oliver, whose family once shared a close bond with Cora’s before time and circumstances fractured that connection.

From there, the trio face a series of perilous challenges amid aftershocks, fires, and destruction, uncertain if they’ll ever make it home to their families.

As in most of Nielsen’s novels, readers will be gripped from the very first page and held fast until the end. Chapters marked with times and dates mirror the relentless rumbling and chaos spreading through San Francisco, heightening both the tension and the atmosphere.

A powerful, fast-paced survival story—highly recommended for upper elementary and middle grade readers.
Profile Image for Connie.
209 reviews
Review of advance copy received from Netgalley
February 24, 2026
The great San Francisco earthquake in 1906 was the focus of this middle grade book. Nielsen writes from a young girl’s perspective, who has been traipsing all around the city, avoiding the street gang who is after her and looking out for her father who could return home any day now. Cora finds herself down by the docks when the earthquake hits, and is sucked down a hole, along with Chi, her new friend who is Chinese American. The other piece to this story is Oliver, the boy who’s family used to be good friends with Cora’s but had a falling out over a mine dispute.
This is one book where I really wish I could rate in half stars as this is a solid 3.5 star read for me. The topic was interesting, but the delivery could have been less choppy and repetitive. This beginning was an immediate attention grabber, and the ending sped forward at breakneck speed, however the middle of the book lagged without the same tension. I also don’t feel that the timeline at the beginning of each chapter was helpful, especially since nothing in the chapter eluded back to the chapter heading and it created a choppiness to the story. A map of the city would have been more helpful. On the good side, this was a much needed historical fiction book for middle grade readers and I did enjoy learning about the aftermath of the earthquake. Recommended for upper elementary and middle school readers.
Profile Image for Darla.
5,020 reviews1,304 followers
Review of advance copy received from Edelweiss+
February 27, 2026
The San Francisco Earthquake is a siginificant event in our nation's history. I was thrilled to discover that Jennifer A. Nielsen had a new book coming out about the event.

What was it like to live through those catastrophic days in 1906?

Here are some things I really appreciated about this upcoming title:

👧Cora Henshaw is our narrator. She is a scrappy heroine who is not afraid to get her hands dirty. There was a bit too much made of her astrological sign, but she did use her head to think about overcoming the obstacles in her way.

👦Oliver Brennan is an old friend and he provides needed support for Cora in the aftermath of the earthquake. Their families have been feuding so the relationship is complicated and adds to their distress.

🐉The Chinatown population was also deeply affected by the earthquake in addition to the racial strife in the city. Nielsen gives us some insight into how the conflict would have played out before and after the disaster.

📕This is one action-filled story. Cora and Oliver both face real moments of peril and must think quickly. I found myself wondering what I would do if faced with their dilemmas.

Readers who enjoy the I Survived series by Lauren Tarshis will also want to check out these disaters stories by Jennifer A. Nielsen. Thank you to Scholastic Press and Edelweiss+ for a DRC in exchange for an honest review.
22 reviews
November 2, 2025
I went into this book knowing very little about the San Francisco fires, and I loved how it inspired me to look up more about that period in history. The opening chapters were especially interesting to me. I could have spent even more time underground with the girls! I also liked the unique chapter titles noting which parts of the city were burning and at what times. One of my favorite aspects was the cross-cultural friendship that formed despite the societal barriers of the time.

On the other hand, the group of antagonist boys didn’t work as well for me. They felt a bit contrived and appeared so frequently that their presence started to pull me out of the interesting historical fiction part of the story. I understand they were meant to add tension beyond the fires themselves, but their role felt overplayed.

I always enjoy Jennifer A. Nielsen’s writing, and while this wasn’t my favorite of her books, it’s still a solid read. The topic may have made it harder to write a fast moving plot, but the historical details and themes of resilience and friendship make it well worth reading for fans of historical fiction.

I was provided an ARC from NetGalley in exchange for my honest review.
Profile Image for Megan | Reads Alotl Books.
366 reviews10 followers
May 3, 2026
Wow! Jennifer does it again! My teen boys loved reading this book with me and I can't wait to get it for my classroom. My students love historical fiction and every time a new one comes out, they beg for it to be added to the shelves. It's a faster paced, deeper read than the I Survived series and full of history and intriguing characters. We've read a few of Jennifer's books this year and I can't wait to read this one to them.

Cora is such strong and well developed character, even with everything happening to her. I loved the friendships she had to build with Chi and Oliver, while simultaneously trying to find her family after the earthquake. The story jumps right in and has you riveted from the beginning. The facts and storyline together blended well and kept you hooked. The fight for survival after being buried and living through the aftershocks was thrilling and the bravery and friendships created magic. Even when guessing who was good or not, you are cheering them on and finding strength in their story.

This is a must read for older elementary and middle grade students! I'm so glad I was introduced to Jennifer's books, because my kids and my students are hooked!
343 reviews4 followers
Review of advance copy received from Netgalley
January 24, 2026
Have you ever wondered what it was like to live through the earthquake of San Francisco in 1906? Having grown up in California and lived through many earthquakes, it is always interesting to learn more.

Cora is on her way to search the docks for her father when the earthquake hits. She meets a Chinese girl going the same direction and the adventures/horrors begin. As they fight for their lives under the ground, and then above, they both learn about tolerance, friendship, and loyalty. Oliver is an old friend of Cora's , but their parents have had a falling out. He helps in the rescue of the girls, and continues to assist as things go from bad to worse.

During this story we see government officials making decision that feel wrong, like a shoot to kill order on al looters, and other governments officials with understanding and empathy.

As a fan of Jennifer A Nielsen, I am excited to share this book with my Elementary Students!

Thank you to netgalley and scholastic for an early copy to read and leave an honest review.
Profile Image for Yeslech.
436 reviews3 followers
April 22, 2026
"Long afterward, scientists would say it was the worst natural disaster ever to hit a major North American city, an earthquake measuring 7.9 in magnitude."

- huge emphasis on astrological signs
Other themes include: racism re: Chinatown, martial law, underground ships, 40 cents an hour pay, the Golden Hydrant, General Funston dynamited building to 'prevent' the spread of the fire, fighting fires with vinegar

Mama: "Your father should be proud of you."
Oliver: "And you should be proud of Cora..."
Mama: "What gives him the right to tell me how to feel about my children?"
WHAT just happened?

Chapter 26:
"I asked if your family might come stay with us, just until you can find a better option. My father said you'd be welcome there."

And then in Chapter 32:
"Would your father object to them staying"
"No of course not, but only because I never asked him"

"I asked myself whether Joey would ever attempt something like this, then immediately answered my own question. No, he would not. Because he was only two years old." ?!?!
Profile Image for Ellie.
313 reviews5 followers
April 26, 2026
Oh gosh, where to start....
First of all, the main character is incredibly annoying. She also takes a huge part of the plot for finding her family, and making sure they are safe... But when she does find them, "Oh look they are alive, I can do my own thing", the story won't really get back to them, whatever.
I almost DNF'd it because she kept bringing up "Oh I'm a Capricorn, we're smart, yada yada yada.... It is mentioned in almost every chapter, at least once (I wish I was joking). If it isn't Capricorns, she's lamenting that she wasn't born under a different sign. I didn't care about it the first time, let alone the 25th. I think it's stupid regardless. I didn't think people made as big a deal about horoscopes until the 1920s, but maybe the author was running out of ideas. Who knows?
This is the second book by Jennifer Nielson that I thought was pretty bad (the one about Everest being almost as bad as this one). The story just drags, and the main character is flat and unlikable.
It makes me sad, because I used to LOVE her books.
Profile Image for Allison Haehnel.
236 reviews1 follower
October 20, 2025
Thank you to NetGalley and Scholastic Press for the digital ARC of Magnitude. This was the first book I have read by Jennifer A. Nielsen. She has a wonderful narrative style for middle-grade readers. "Magnitude" tells the story of Cora, Oliver, and Chi as they navigate San Francisco after a strong earthquake in 1906 that started fires and demolished buildings. The devastation isn't the only risk for these three. Cora owed money to boys who loaned her money from a surprisingly unscrupulous city leader. Many times, their greedy hands proved to be more dangerous than the city's terrain after the quake. Junior high students will appreciate Ms. Nielsen's novel if they are previous fans of the "I Survived" series and are looking for a new challenge. I highly recommend this for girls due to the brave female protagonist, historical fiction fans, and those who want to know more about immigrant experiences at the turn of the 20th century.
Profile Image for Diana of Shelved by Strand.
387 reviews28 followers
Review of advance copy received from Netgalley
January 1, 2026
Jennifer Nielsen delivers another hit historical fiction novel with Magnitude, the story of three kids caught in the 1906 San Francisco earthquake. Growing up in California, I’ve known about the quake all my life, yet this is the first middle-grade book I’ve read that shares so many details in a way that’s accessible for younger readers. The story never gets lost in the history, though. Middle-grade readers will find Cora’s story a true page-turner, staying on the edge of their seats as they hope things turn out for her and her friends, Oliver and Chi.

I’ve already preordered this for the historical fiction fans in my middle school classroom and can wholeheartedly recommend it for other Christian school libraries as well. Cora makes some questionable choices, but she wrestles with her conscience as she tries to care for her family. No language or other content warnings.

Many thanks to NetGalley and Scholastic for the eARC in exchange for my honest review.
172 reviews
May 5, 2026
Typo on page 215. Oiver should be Oliver.

The secondary plot in this book is getting to safety and finding family after a big earthquake and fire. The primary plot is seeing if these circumstances can mend the relationship of two families who used to be friends.There is also a plot with a couple gang members trying to collect on a debt.

This book did a mostly good job portraying the experience of the great earthquake in San Francisco in 1906. The streets had horse drawn carriages, bicycles and automobiles. It was good that the book mentioned that automobiles were rare because I was starting to think this didn't seem realistic to have so many cars in 1906. I also thought it seemed unrealistic that the main character (12 year old girl, Cora) rides a bicycle at one point, having seemingly never ridden before.

Content considerations: The main character steals and lies. However, she has a moral dilemma about it and her friends encourage her to do what's right.
Profile Image for Jessie Otto.
149 reviews
Review of advance copy received from Netgalley
January 20, 2026
Magnitude fits right in with the other historical novels by Jennifer A. Nielsen. She is one of my favorite middle grade authors. This story is about the San Francisco earthquake of 1906 and the fires that resulted. I enjoyed this book with themes of friendship, family, and honesty, and thought it was mostly fast paced getting into the action quickly. I will be recommending it to my 4th and 5th grade students. I thought the middle of the book became a bit repetitive with similar events happening multiple times, and similar language or the same phrases used near each other. My favorite book of hers is still A Night Divided, but I do think middle grade students who like historical fiction or her other novels will also enjoy this one. I am excited to have received this as an advanced copy from Net Galley! I give this book 3.5 stars.
8 reviews
Review of advance copy received from Netgalley
February 15, 2026
This book falls into step with Jennifer Nielsen's other middle grade historical fiction books. My son, in sixth grade, and I read many of her books over the summer and this one is top notch. She blends the accuracy of event of the Great Chicago Fire with the humanity of a young person experiencing it. I recommend this book to some of my older fourth graders who have an interest in history and love suspenseful books.

My favorite Jennifer Nielsen book is A Night Divided, but I love how she crafts the storytelling of Cora and the monumental she endured. The friendship between Cora, Oliver, and Zhi is a great aspect to include in middle grade fiction.

Like most of Jennifer Nielsen's book I would want to make sure that my students are mature enough to handle reading about traumatic events and natural disasters, but overall I would highly recommend this book.
Profile Image for Middle Grade Mama.
102 reviews2 followers
November 17, 2025
Set in 1906, Magnitude takes us through the horrific San Francisco earthquake and its aftermath. As Cora tries to find her family, she has to navigate a crumbling city plagued with fires, looting, and corruption. In the midst of never-ending suspense, she finds extreme courage and powerful friendships.

I once heard Jennifer Nielsen say that a coming theme in her books is "danger." And this book definitely fits the bill. I love that this book does such a good job of teaching us about the time period while also telling a great story with dynamic characters. I learned so much and I found myself really rooting for Cora and her friends. I can't wait for more readers to get their hands on this book.
Profile Image for Debra.
1,867 reviews
April 9, 2026
I have not read a Nielsen book yet that was less than riveting. She has a way of capturing the stress, trauma, and situations of her characters that grabs the reader/listener. I listened to this one using the Hoopla app from my public library. I was hooked. Many times I sat in my parking lot at work and waiting for the end of a chapter to get out of the car. Tragedy, like an earthquake brings out kindness and heroics in some folks and greed and violence in others. It is a reality I don't like to admit, as it is so easy to work together to fix problems. Nielsen never shies away from hard truths. I would much rather experience an earthquake in a story than in person. I am grateful for Jennifer Nielsen's historical fiction books!
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