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Fast Track

Too Fast to Fall: A Spicy Grumpy Sunshine Formula 1 Romance

Not yet published
Expected 26 May 26
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So what if she’s crushing on a race car driver? That doesn’t mean it’s love at first lap.
 
But maybe it’s love at first lap dog
 
Yesterday, Piper Murphy was just another dog sitter helping her sister with wedding prep while pretending she’s over her own broken engagement.
 
Today, she’s the fill-in dog sitter for Formula One driver Emilio Baquero. Brooding, gorgeous driver + naughty, cute Lab? Woof, down boy.   
 
When Emilio offers her a five-week gig as his live-in dog nanny in London, Piper can’t help but say yes. It’s out of her comfort zone, sure, but it’s also a ticket to travel, racing, and caring for a dog she already adores. All while escaping the wedding planning that’s put her failures front and center.
 
Only being under the same roof means there’s no escaping Emilio’s intensity, or grumpiness. Piper tries to be a sunny presence, but their clashes just fuel the slow-burn tension to something near combustible.
 
Because falling for your boss is risky when you have a broken heart. Falling for your famous boss and his adorable dog? That’s a crash waiting to happen.

Too Fast to Fall is part of the Fast Track series from Karen Booth. Don't miss the first book, Not So Fast

Kindle Edition

Expected publication May 26, 2026

66 people want to read

About the author

Karen Booth

319 books507 followers
Karen Booth is a Midwestern girl transplanted in the South, raised on 80s music and repeated readings of Forever by Judy Blume. She writes steamy contemporary romance and women's fiction. When she isn't creating fictional hunky men and the women who test them, she's listening to music with her kids, honing her Southern cooking skills or sweet-talking her astoundingly supportive husband into whipping up a batch of cocktails.

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Displaying 1 - 13 of 13 reviews
Profile Image for yueting ♡.
303 reviews11 followers
February 19, 2026
Calling all my dog lovers, you need to read this one! One of my favorite things about Too Fast to Fall is not the sweet and caring romance, not the exciting F1 races, not even the grumpy x sunshine dynamic (which, if you know me, you know I adore), it's the fact that we get chapters in Gus, the dog's, POV.

I've really been on a sunshine nanny and grumpy father (daddy, if you will) kick recently, but this is the first time that the FMC has been a dog nanny—and I love it. Gus is so cute, so lovable, and so invested in making sure Piper and Emilio get together! The antics that Gus pulls is hilarious and sweet, as he wraps his leash around them, pushes Piper into Emilio's arm multiple times, and tries to whine and beg his way into getting them into the same bed.

Everything else that I listed about the romance, racing, and character dynamics were also thoroughly enjoyable. It was so lovely to see Emilio slowly open up to Piper, and how the two of them helped each other heal from their past ex's and relationships. Their romance is sweet, swoony, and so adorable. I would have preferred a bit more communication on their part, the problems that cropped up towards the last third of the book could have been solved with just a bit more talking! But ultimately, the scenes that came of it and their confession and HEA still felt worth it.

I also thought the F1 elements in this book were really well done. I am a huge fan of how Karen Booth alternated POVs within a chapter to give us both Emilio and Piper's thoughts during a race. It kept the pace rapid, matching the thrill of the cars and the laps as they counted down.

Definitely a racing romance that I'll be adding to my recommendations list. A really fun and sweet one for if you need a quick romance that will leave you with a huge smile on your face.

three-point-five stars

thank you so much to harlequin books for the e-arc via netgalley review!
Profile Image for Mora ౨ৎ .
35 reviews
Review of advance copy received from Netgalley
February 20, 2026
✦⚬───────────────────────────✧───────────────────────────⚬✦
ꜱᴛᴀʀᴛᴇᴅ/ꜰɪɴɪꜱʜᴇᴅ: 11 ꜰᴇʙ/12 ꜰᴇʙ
ᴅɪꜱᴄʟᴀɪᴍᴇʀ: ɪ ɢᴏᴛ ᴛᴏ ʀᴇᴀᴅ ᴛʜɪꜱ ʙᴏᴏᴋ ꜰᴏʀ ꜰʀᴇᴇ ᴛʜᴀɴᴋꜱ ᴛᴏ ᴛʜᴇ ᴀᴜᴛʜᴏʀ/ᴘᴜʙʟɪꜱʜᴇʀ ᴠɪᴀ ɴᴇᴛɢᴀʟʟᴇʏ, ʙᴜᴛ ᴍʏ ᴏᴘɪɴɪᴏɴ ᴡɪʟʟ ʙᴇ ꜰᴜʟʟʏ ᴍʏ ᴏᴡɴ.
ʀᴇᴀᴅ ɪꜰ ʏᴏᴜ ᴡᴀɴᴛ: ꜱᴘᴏʀᴛꜱ (ꜰᴏʀᴍᴜʟᴀ 1) ʀᴏᴍᴀɴᴄᴇ, ʙᴏꜱꜱ x ᴇᴍᴘʟᴏʏᴇᴇ, ꜰᴏʀᴄᴇᴅ ᴘʀᴏxɪᴍɪᴛʏ (ʟɪᴠᴇ-ɪɴ ᴅᴏɢ ɴᴀɴɴʏ), ɢʀᴜᴍᴘʏ x ꜱᴜɴꜱʜɪɴᴇ
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Rating 3.25/5 | Spice 4/5 on the romance.io scale (1= Glimpses and kisses, 2=Closed door, 3=Open door, 4=Explicit open door, 5=Explicit and plentiful)

You can definitely tell that the author is a real F1 fan which I appreciated, it felt authentic. The premise of this book was really cute too, but the relationship itself felt like I needed a bit more to really see them falling in love, I needed the emotional part a bit more. I do realise that's just a personal wish for me, and it did a way better job than recent books I've read.
The writing is done well and it was a nice easy read because it's paced well. The book has a few chapters from the dog's POV and at first I thought it was kinda cute, but it became a bit cringy cause it was written as if the dog had thoughts and made decisions, like he was their cupid. I also feel like MMC acted a bit too young for his age.
Overall, I had a nice time reading this book, there is nothing wrong with it but it also wasn't a wow for me.

⊹₊ ˚‧┈┈┈┈⋆ ᴛʜᴇ ʀᴇʟᴀᴛɪᴏɴꜱʜɪᴘ ⋆┈┈┈┈‧ ˚ ₊⊹
I liked that besides their insta-lust (which is very clear) they had genuine moments of appreciation for their personality/struggles. It was sweet and it worked. What didn't work entirely for me though is how much the narrative tried to convince me that they were deeply falling. There was constant push from others (the dog, the sister, the friend etc) to go after eachother, but I didn't feel it. I do like them together. FMC was a ray of sunshine, always positive and supportive. MMC was really drawn to that, and it's kinda what he needed in his life/career. He was also there to listen to her and make her feel better. I do feel them falling for eachother is genuine, I just wished I personally felt/read it more too.
There is a sort of 3rd act breakup because they both don't (dare to) share their feelings, but they get back together so soon that I didn't really mind it.

⊹₊ ˚‧┈┈┈┈ꨄ ᴛʜᴇ ꜱᴍᴜᴛ ꨄ┈┈┈┈‧ ˚ ₊⊹
Open door scenes, explicit. There are about 3 scenes and it takes a long enough time for it to happen/make sense. They were the right length. Nothing too different from most books tho, just normal vanilla sex with no dirty talk. Also, FMC's sister says "lady bits" twice and I really think authors need to abandon that description...

⊹₊ ˚‧┈┈┈┈୨୧ ᴄʜᴀʀᴀᴄᴛᴇʀꜱ ୨୧┈┈┈┈‧ ˚ ₊⊹
MMC

About: Emilio Baquero, 30, Spanish Formula 1 driver
Appearance: Thick dark slightly curly hair, chestnut brown eyes, bronze skin, full lips, athletic build
FMC
About: Piper Murphy, age not mentioned, dog carer
Appearance: Blonde hair, big blue eyes

⊹₊ ˚‧┈┈┈┈✦ ꜰᴇᴀᴛᴜʀᴇꜱ ✦┈┈┈┈‧ ˚ ₊⊹
Standalone
HEA
Vanilla smut
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Profile Image for Marcus Mitchell.
18 reviews
Review of advance copy received from Netgalley
February 19, 2026
Woof. Maybe this one just wasn't for me. While I think it has moments of sweetness as the two main characters find their way back to realizing they're worthy of love, there's a real lack of substance going on that makes it hard to care. I don't mean for it to sound as callous as it is to call this book boring, but it was. So many of the problems faced were illusionary and paper thin obstacles that were solved by common sense or a stern talking to.

While I can usually look past a "will they, wont they" romance exacerbated by characters not saying what they feel, the book didn't do enough to really make me think of the character motivations as anything more than superficial excuses for the plot to happen. Subplots crop up and then are IMMEDIATELY extinguished as non-issues and it's hard not to wonder why they were included at all. And at the end of the day, most of all of the tension was a big nothingburger. It wasn't as if Booth made bad choices really, there was just nothing going on that particularly grabbed me as interesting. The emotional beats just did not land at all and were as shallow as a workplace motivational poster.

As for the writing itself, the dialogue was often stiff and even eyerolling at times. Piper and Emilio have practically no verbal chemistry with one another, which is a major bummer as that's usually a highlight of the grumpy x sunshine trope. Side characters don't really have enough presence to make a mark and mostly exist to make the main characters want to lean on each other in some fashion. The split POVs that take place WITHIN the same chapters weren't exactly jarring, but it made it hard to settle in with either character as events folded in. I think the format has legs when it came to the racing scenes, but ultimately I just found myself getting pingponged around when I wanted to have the characters show some introspection.

Also, I nearly DNF'd from the getgo when it began with the dog's POV. It's a cute idea and the book is probably better for trying it, but reading a dog make a dick joke about itself just isn't for me, and that's zero diss to the people who found it cute or funny, you do you.
Profile Image for Julie Parks.
Author 1 book84 followers
Review of advance copy received from Netgalley
February 20, 2026
This was short and corny in the best of ways. With super sweet leading and supporting characters, gorgeous destinations and exciting romantic development. I'm guessing it's a norm for a Harlequin romance but it was my first so I might be wrong.

The short chapters written in the witty dog named Gus POV felt like a cute cherry on top.

I'm not a seasoned Formula 1 fan or even someone who's read a lot of sports novels, so I don't know the regular guidelines here. But this story was easy to follow and the book felt way more focused on the character development, with a few chapters of delicious spice in between, and certain serendipity that is life - a dog loving Formula driver who's in dire need of a dog sitter suddenly finds a dog sitter who's also a big Formula 1 fan (with a secret crush on him). It's cute, you can't deny that!

Too Fast to Fall a definite pick-me-up story!

Thank you to Netgalley and Harlequin Romance for the chance to read this in exchange for my honest review.

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Profile Image for Clare.
146 reviews6 followers
Review of advance copy received from Netgalley
February 15, 2026
🩷 Book Review 🩷
📚 Too Fast to Fall
✒️ Karen Booth
💫💫💫💫💫

Thank you to the publisher and Netgalley for an eARC in exchange for an honest review.

This book is for all the F1 girlies that are new to the sport and have been looking for a book that has a POV from the bestest dog to ever be.

Piper Murphy is a dog sitter that has the opportunity of a lifetime dog sitting for Emilio, a F1 driver and travel with the team. Emilio is a grumpy, intense driver whereas Piper is the bubbly sunshine who loves dogs.

Too Fast to Fall is fast paced, action filled and has laugh out loud moments throughout. I thoroughly enjoyed Gus's POV, it added a unique side to the story and I would easily read a whole book from Gus.

As a F1 fan, you can tell that the author had taken the time to research the sport. I did not realise she had written a previous F1 book and I have no added it to my TBR!
Profile Image for Anne.
693 reviews1 follower
Review of advance copy received from Netgalley
February 13, 2026
Too Fast to Fall is a sweet, engaging romance about a dog nanny and a Formula One driver whose lives collide when his dog, Gus, needs a caregiver. The setup is fun and refreshing, and the connection between the characters develops naturally.

Gus was a standout for me. I especially enjoyed the added perspective from him, which brought warmth and personality to the story.

I do not know much about Formula One racing, but that did not detract from my enjoyment. The racing elements added energy and tension without overwhelming the romance.

Overall, this was a strong follow-up to the first book in the series. A charming, lighthearted read that will especially appeal to dog lovers and romance fans alike.
Profile Image for Paris Jo.
97 reviews
Review of advance copy received from Netgalley
February 16, 2026
This book is for the girlies that love an F1 romance.

I loved this book, the slow burn and the little moments between them as they slowly worked up the courage to make it into something more had me so excited for them to get together.

I really enjoyed the little pov’s from the dog Gus. They were so funny and made the book feel so lite.

During this book you kept having cameos of the characters from the previous book which was really nice to see as you got to where there relationship had gone.
Profile Image for Sam DeYoung.
288 reviews7 followers
February 19, 2026
ARC NetGalley, This is such a cute easy and quick read! I loved the first book in this series and enjoyed this book as well. I loved the seamless connection back to the previous books characters, it didn’t feel forced at all.

Why must authors use the word “hella” these days..not being able to leave your dog home alone for a few hours is kinda toxic. Crashing a wedding and making a scene during the speech is a criminal offense.

- grumpy x sunshine
- F1 racer x dog nanny
- Forced proximity
- Matchmaker dog
- Divorcing parents
- Called off engagement
This entire review has been hidden because of spoilers.
Profile Image for J.
Author 2 books7 followers
February 16, 2026
Netgalley ARC review

Emilio and Piper are our main characters in a formula 1 romance. The boss x employee trope- Piper is Emilios dog, Gus's, dog nanny, travelling with them to races. Overal this was a fun read (my first F1 sports romance) and contained a fast paced tense relationship conveyed through the impact of media, and family relationships balance, whilst handling big changes in their lives.
Spice: 3/5
Profile Image for Stephanie Boling.
156 reviews21 followers
February 16, 2026
📖ARC Review📖
⭐⭐⭐⭐/5
If there is one thing I love, it is dogs! Another? Books with dogs as one of the main stars. This book is warm, charming and heartfelt.
The chemistry between Olivia and Connor is gradually built. The author writes them where they have moments of clashing, misunderstandings, and growth. Together and separately. The writing style is clean, with brisk (but not rushed) pacing. The banter between both Olivia and Connor is definitely a book highlight!
Profile Image for jade ⋆₊˚ ᰔ.
145 reviews8 followers
February 19, 2026
thank you harlequin and Karen Booth for the ARC!!

this is so cheesy in the absolute best way. it started off with a dogs POV & I was IMMEDIATELY hooked

grumpy x sunshine
F1 Racer x dog nanny
slow burn

I would absolutely recommend this to anyone who wants to read a fluffy romance book, especially to anyone who likes F1 racing. this author knew what she was talking about!!
Profile Image for jessica.
211 reviews3 followers
Review of advance copy received from Netgalley
February 19, 2026
I liked this story unconventional and still had some angst and real life in it. she torn between when the next chapter is in her life and got a great opportunity will the man stand by her or in her way? being a grown up isnt always fun and parents arent always the greatest I related to parts so well!
I received this as an ARC read and write this on my own will
Profile Image for Jubilee.
127 reviews
February 20, 2026
Thank you Harlequin and NetGallery for the ARC!
Overall 2.5/5 star ready for me.
It was a quick easy ready, but the romance build up was so forced, but there were a lot of time gaps in the story so there was potential to expand on the relationship growth. It was fun read, but nothing extraordinary.
Displaying 1 - 13 of 13 reviews

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