- Chapter Books
- Ages 9–12
- Mystery
The Goldfish Boy
Book 1 of 3 in Goldfish BoyView the full series
A twelve-year-old boy whose severe OCD keeps him housebound becomes the last person to see a missing toddler alive, and has to solve the mystery from behind his bedroom window. A gripping whodunnit that is also one of the most empathetic portraits of childhood OCD in middle-grade fiction.
- Best for9–12
- FormatChapter
- Length320 pp
- Read aloud~4 hr30 min
The vibe
What it’s like.
Style
- Conversational
- Literary
Tone
- Suspenseful
- Thought provoking
- Heartwarming
- Bittersweet
Themes
Experience meters
What’s it about?
The story.
Matthew Corbin has severe OCD. He hasn't been to school in weeks, washing his raw and cracked hands until they bleed and watching his neighbours on Chestnut Close through his bedroom window, recording their comings and goings in a notebook. It's a small, safe world. Then the toddler from next door, fifteen-month-old Teddy, vanishes from the garden in broad daylight, and Matthew realises he may have been the last person to see him. Suddenly the boy who can barely leave his room is the key to a real mystery, with every neighbour a suspect. Helped by cemetery-obsessed Melody Bird, Matthew has to push past his fears to piece together what happened. Lisa Thompson's award-winning debut is a page-turning whodunnit wrapped around a tender, honest story about the roots of Matthew's anxiety and the courage it takes to ask for help. Warm, gripping and quietly moving, it treats mental illness with rare care while never letting the mystery slacken.
Fit check
Right for your child?
Where it lands by age
Squarely a 9-12 read, independently or aloud. The mystery pulls confident readers of nine along, while the honest handling of OCD, anxiety and a family bereavement gives it real weight for older ones. Best for children ready for emotionally serious realism, not the youngest end.
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- Best fit · 9–12
- Read aloud · 9–12
- Independent · 9–12
Prose load
Moderate
Visual support
None
Reluctant-reader friendly
Workable
Read-aloud quality
Workable
Works well for
- Gift-buying
Preview before sharing if a child is sensitive to: mental health, grief, death of character.
Bedtime suitability
2 / 5 · Better outside bedtime
Sensitive-child
2 / 5 · Use judgement
Graphic intensity
1 / 5 · None
Best for
- Mystery lovers
- Emotional realism
- Anxiety and ocd
- Empathy building
Avoid if
- Wants light bedtime read
- Sensitive to anxiety content
Particularly good for children who are…
- Anxiety and worry
- Neurodiversity or learning differences
- Bereavement
Why it lands
Why they love it.
Why kids love it
Matthew watches everything from his window, so when a toddler vanishes he's the one holding the clues. It's a proper whodunnit with real suspects, and readers who feel anxious or different will finally see themselves in a hero who saves the day without pretending to be someone else.
- Being a detective
- Being understood finally
- Proving yourself
Why parents love it
One of the most compassionate depictions of childhood OCD in middle-grade fiction, wrapped inside a genuinely gripping mystery. It opens honest conversations about mental health and asking for help, and it's written with real warmth and craft rather than an issue-book flatness.
- Conversation starter
- Great writing
In the series
Goldfish Boy.
3 books · open the series →
About the creators
About the creators.
If you liked this
Three ways out of this book.
If you liked this, try…
Lateral matches. Same shelf, different texture.
Where to go next…
Escalation reads — a step up in scale, silliness, or stakes.
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