The Detention Diaries: Worse than Jail
By Author / Illustrator
Sam Copeland
Genre
Funny Stories
Age range(s)
9+
Publisher
Bloomsbury Children's Books
ISBN
9781037202230
Format
Paperback / softback
Expected
27-08-2026
Synopsis
The ultimate boy-friendly read! A brand-new diary-format series documenting the howl-somely funny injustices of Arthur Guppy whose best intentions always lead to the detention room.
Arthur Guppy is in detention. The school axolotls have been kidnapped and Arthur is the prime suspect. But how did Arthur's best friend, Carlos Chickens, and an unusual assortment of their classmates end up in there with him? Arthur is about to tell you... and you may also learn:
WHY you shouldn't glue nits to your face
HOW to do a standing up wee without pulling your trousers down
And MUCH more!
Jam-packed with 400+ black and white illustrations by the multi-talented Dominic Trevett, this is a book full of laughter, warmth and chaos, destined to be a classroom favourite.

Extract from the start of Detention Diaries: Worse than Jail by Sam Copeland
Reviews
Beverley
Arthur Guppy is having a tough time! The school axolotls, Wet Willie and Mad Maxolotl, have been kidnapped. Miss Clench, the head teacher, is distraught and, even worse, Arthur has become the prime suspect in the disappearance. With the help of his best friend, Carlos Chickens, Arthur is determined to solve the mystery of the missing axolotls, and clear his name.
The Detention Diaries: Worse than Jail is a well-written, laugh-out-loud book that will appeal to both boys and girls, and particularly reluctant readers. Presented in a diary format, the novel is fast-paced and easily accessible. Arthur is a great character, funny, clever and loyal to his friend Carlos. The two boys do everything together and some of their adventures are hilarious, involving stapled trousers and fake beards made out of nit-infested hair. Arthur somehow avoids detentions, sometimes by the skin of his teeth.
At home, we meet Arthur’s Pilates loving father, his long-suffering mother, and twin siblings Geoff and Willow, along with the family dog - also called Arthur! My proof copy of the novel did not include all of the illustrations, but those that were there, by Dominic Trevett, were a perfect addition to the text.
I really enjoyed this clever, funny book. I particularly loved the moment when Arthur is talking to his dad and becomes upset. He tries to hide his tears, but dad tells him not to do this, saying "Don't ever be ashamed of showing emotions, because emotions show you care." By the end of the novel Arthur and Carlos's friendship group has expanded substantially and they have been accepted into the Fooligans gang.
The story comes to a satisfactory conclusion, and sets us up nicely for a sequel. I can't wait to meet Arthur Guppy and his friends again, and am already looking forward to their next adventure. I can see that this book will become a classroom and library favourite. Highly recommended.
240 pages / Reviewed by Beverley Somerset, school librarian
Suggested Reading Age 9+
The World's Worst Alien
Mallory Vayle and Maggoty Skull in... The Beast from Beneath
Prince Kal vs the Salivator Alligator
The Takeover: Volume 2 (Ministry of Mischief)
