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Geronimo Stilton #51
The Enormouse Pearl Heist
Each Geronimo book is fast-paced, with lively full-color art and a unique format kids 7-10 will love. One day, my friends and I, Geronimo Stilton, made an amazing discovery. We found a huge oyster -- with an enormouse pearl inside! I was so excited about this extremely rare, precious pearl that I wrote a special feature about it in The Rodent's Gazette. That article attracted lots of attention -- both good and bad! The enormouse pearl was in danger of being stolen. Would my friends and I be able to protect it?
128 pages, Paperback
First published January 1, 2009
About the author
Geronimo Stilton
1,737 books3,304 followersA pseudonym of Elisabetta Dami, see also Tea Stilton.
Elisabetta Dami is an Italian author that currently resides in Italy. She is the author of the Geronimo Stilton series, a bestselling childrens book. She enjoys traveling the world seeking ideas for her series. She writes under a pseudonym of Geronimo Stilton. She is also a co-owner of Italian based publishing company Edizioni Piemme.
Elisabetta Dami is an Italian author that currently resides in Italy. She is the author of the Geronimo Stilton series, a bestselling childrens book. She enjoys traveling the world seeking ideas for her series. She writes under a pseudonym of Geronimo Stilton. She is also a co-owner of Italian based publishing company Edizioni Piemme.
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Displaying 1 - 30 of 46 reviews
December 11, 2018
I absolutely devoured these books as a kid and since I'm going through a rough time right now, I decided to read one for comfort and ended up reading 4 haha. Don't judge me, I need book "comfort food". It wasn't even as bad as I thought it was going to be, I was obsessed with them in elementary school but i figured they wouldn't really stand the test of time. They held up pretty well though and did their job of comforting me, even if it was only temporary ;)
June 9, 2020
I liked this book because it was funny and the pearl was beautiful. It wasn't very good but it was okay. my favourite character in this book was Prof. Gil fishy whiskers because he was guarding the pearl and knew how to open the oyster. I loved that he kept it a secret. I didn't like the part where Aunt sweet fur kissed Gray fur it was disgusting !!!.
December 20, 2022
Oh WOW, eindelijk weer eens een toffe Stilton! Wat heb ik genoten van dit toffe boek (en echt Patty en hij moeten gewoon samen komen en laten we dus gewoon ophouden met dat hele Duifje gedram). Een spannend avontuur, duiklessen, mysterie, goede familiedingen, een prachtige oester met parel, een ontvoering, en nog veel meer. Ik vond Stilton ook iets minder zeurderig en wat stoerder. Ook leuk vond ik dat er door het boek vragen stonden die je lieten nadenken over een plaatje of iets dat gezegd was. Erg leuk gedaan!
June 2, 2024
Geronimo Stilton is definitely a fun little mouse detective. My third grade student loves his stories!
August 28, 2013
Geronimo is kind of irritating. He's shallow and wimpy -- he only talks about (1) how gorgeous Petunia Pretty Paws is, or (2) how scared he is. I was kind of bored; the only thing that kept my attention was the changing font.
October 13, 2015
This is my second book from the series and I will definitely read more.
August 22, 2019
Thi book is about a group of mouse searching for the enormous pearl. They face many difficulties throughout the searching of the pearl. It is a rare, precious pearl inside a huge oyster. On the other hand, another group of mouse wants to get the pearl and sell it for money. Geronimo and his family found a huge oyster with four ribs. However, they found out that a book says the real oyster has five ribs. At last, they found the real oyster and brought it back to a museum. I like this book because it is interesting and exciting, but it would be better if there were more thrilling plots.
December 28, 2023
We're so proud you read "The Enormouse Pearl Heist" by Geronimo Stilton. This exciting adventure teaches us about courage, problem-solving, and honesty. You learned how Geronimo and his friends worked together to solve the mystery, showing the importance of teamwork and thinking creatively. You can use these lessons by working well with others, being brave when facing challenges, and always being honest. Remember, just like Geronimo, you can achieve great things when you put your mind to it and work with others.
Love,
Mom and Dad
Love,
Mom and Dad
October 2, 2020
I read this book with my brother (7 years old) and this is his review
Things he liked:
- solving the mystery
- the fun colorful words
- the pictures
Things he didn't
- the stealing (because stealing is mean)
Things he liked:
- solving the mystery
- the fun colorful words
- the pictures
Things he didn't
- the stealing (because stealing is mean)
February 27, 2020
So,geronimo found an oyster and was worried that someone would steal it
March 5, 2020
We liked the "clues" to help solve the mystery along the way.
August 25, 2020
The artwork was better, but the story was pretty average.
April 22, 2022
Great book
January 23, 2023
The mouse puns get a bit tired.
March 4, 2024
No está mal, aunque demasiado inconexas algunas escenas.
January 2, 2025
Adventure and heist stories told in a usual Geronimo Stilton way.....
June 22, 2025
O meu namorado ofereceu me meio que numa brincadeira e olhem adorei.
Amava esta coleção em miúda
Que conforto ler
5/5
Amava esta coleção em miúda
Que conforto ler
5/5
October 26, 2025
This book was really good and I read it in one day!
December 23, 2025
Deducted one star because tbh I would have preferred if the oyster was preserved in its natural habitat.
This entire review has been hidden because of spoilers.
January 7, 2026
The book is best for children detectives
July 4, 2023
Finally read an OG book, instead of "Geronimo Stilton's Sister's Fan Club starring Geronimo Stilton's Sister for like a paragraph but it's billed as a Geronimo Stilton's Sister Book anyway"!
I... am irritated by the extent to which it digs into the myth of mice eating cheese (though to be fair, Geronimo gets sick from eating the cheesecake), but more than that, the little details:
- Geronimo needs summer weather clothes, so they load him up with SANDALS WITH SOCKS and (as continues on the next page) A SCARF

- they find an enormous oyster (hence the name), and Geronimo declares they will document it then leave it in the ocean where it belongs... then [SPOILER]
ABSOLUTELY TAKES IT OUT OF THE OCEAN TO PUT ON DISPLAY
- they leave its pearl inside while displaying it, like... that thing's like a gallstone to an oyster, you really gonna make it keep suffering?? [maybe if it were a smaller pearl, that'd be one thing, but the pearl in this book is HUGE and can absolutely be removed without hurting the oyster!)
- (spoiler about music and the oyster reacting to it, as though music is a thing in the ocean... but they're ANTHROPOMORPHIC MICE SO WHATEVER I GUESS???)
...I get it's cute having animals be associated with certain things, but... ehhhh, still mostly mad about the cheese fixation
Cute series, but I'm definitely not the target audience, haha...
I... am irritated by the extent to which it digs into the myth of mice eating cheese (though to be fair, Geronimo gets sick from eating the cheesecake), but more than that, the little details:
- Geronimo needs summer weather clothes, so they load him up with SANDALS WITH SOCKS and (as continues on the next page) A SCARF

- they find an enormous oyster (hence the name), and Geronimo declares they will document it then leave it in the ocean where it belongs... then [SPOILER]
ABSOLUTELY TAKES IT OUT OF THE OCEAN TO PUT ON DISPLAY
- they leave its pearl inside while displaying it, like... that thing's like a gallstone to an oyster, you really gonna make it keep suffering?? [maybe if it were a smaller pearl, that'd be one thing, but the pearl in this book is HUGE and can absolutely be removed without hurting the oyster!)
- (spoiler about music and the oyster reacting to it, as though music is a thing in the ocean... but they're ANTHROPOMORPHIC MICE SO WHATEVER I GUESS???)
...I get it's cute having animals be associated with certain things, but... ehhhh, still mostly mad about the cheese fixation
Cute series, but I'm definitely not the target audience, haha...
January 16, 2015
Tittle:The Enormouse Pearl Heist
By:Geronimo Stiltion
I think that the enormouse pearl heist is a very good book because there is a lot of action.There was a rat named Geronimo Stiltion he went to an island for a vacation with his mom,nephew,and his friend they went to the airport and got on a water plane and left.Geronimo was flying and he saw the island and was worried because where were they going to land his friend said,''in the water'' he was scared then Geronimo got off the plane and he got wacked in the head by his suitcase.Then they went to their apartment and Geronimo take a nap with an ice bag on his head then he woke up and ate dinner with his family and friend then the manager brang out chessecakes and he ate 4 big slices of them and he went to bed and was sick because he ate too much.Then Geronimo went to stay still and not fall in the water but he couldn't stay still and fill in the water and he saw a big blue something and its mouth was huge and he swam back up.Then he called his professer and told him he found a gaint clam so he went to the island and he got the clam carefully he will put it in an aquarium.Then stiltion knew people tried to steal it so he made a fake clam and send it to the professer and the real clam was at the island so nobody can steal the clam or damage the pearl.
By:Geronimo Stiltion
I think that the enormouse pearl heist is a very good book because there is a lot of action.There was a rat named Geronimo Stiltion he went to an island for a vacation with his mom,nephew,and his friend they went to the airport and got on a water plane and left.Geronimo was flying and he saw the island and was worried because where were they going to land his friend said,''in the water'' he was scared then Geronimo got off the plane and he got wacked in the head by his suitcase.Then they went to their apartment and Geronimo take a nap with an ice bag on his head then he woke up and ate dinner with his family and friend then the manager brang out chessecakes and he ate 4 big slices of them and he went to bed and was sick because he ate too much.Then Geronimo went to stay still and not fall in the water but he couldn't stay still and fill in the water and he saw a big blue something and its mouth was huge and he swam back up.Then he called his professer and told him he found a gaint clam so he went to the island and he got the clam carefully he will put it in an aquarium.Then stiltion knew people tried to steal it so he made a fake clam and send it to the professer and the real clam was at the island so nobody can steal the clam or damage the pearl.
August 3, 2013
it was a good book with very fraidy mouse who thinks he saw a ginormouse blue fish trying to eat him but it was actually a giant oyster! then these crooks try to steal it. can geronimo and his friends solve the problem?
October 9, 2014
As I expected, this book was so amazingly good because it made me both scared and laugh. All of the Geronimo Stilton books in the series are just too good to read! I think anyone can enjoy this book because even though it's an easy book, it will make you lose your mind because it's just too good!
August 25, 2015
Very fun book! Loved the way images are used as clues to solve the mystery and the colorful, varied font throughout. Plot was fun, kept light but had ideas and issues to further explore. There are romantic overtones, but only referenced and not acted on.
August 16, 2016
The book was so cool but i already sensed something bad happening because those people were acting all mysteriously the best part was the ending but i couldn`t tell by the diffrece between the fake one and the real one.
August 7, 2018
Very fun book! Loved the way images are used as clues to solve the mystery and the colorful, varied font throughout. The plot was fun, kept it light but had ideas and issues to further explore. There are romantic overtones, but only referenced and not acted on.
December 28, 2012
I loved this book, it was a lot of adventure and funny bits. It is one of the best Geronimo books I have read so far.
February 27, 2013
Geronimo Stilton books are the best books ever!!!!! This one was awesome because there was a giant pearl In it!!!!!!!!!!!:):):):):):):)$$$$$$$$$$
Displaying 1 - 30 of 46 reviews






















