Every Casey Fletcher series comes as a pair: a story to read, and a companion book to work through. Crack the codes, collect the passport stamps, talk about the big feelings, and unlock what happens next.
Find a bookHow it works
Two books that work together, so reading turns into doing.
Follow a hero your child can root for: a detective, an explorer, a stranded space crew, or a little monster with a big feeling.
At key points the story stops. The clue is coded, the map is wrong, the door won't open, or it's time to pause and feel.
Work it out in the companion book, with real puzzles, maps, codes and activities, then go back and unlock the next chapter.
Seven series. Pick the shelf that fits your reader.
Stories that give kids words for what's happening inside, with activities that help them practise.


Four little monsters, four big feelings: worry, anger, sadness and joy.
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Novels for readers carrying more than they say out loud.
See the books →Mysteries, missions and maps. The hero can't finish without your reader's help.


Three kids. One broken space station. Seven puzzles between them and home.
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Endangered animals are vanishing from the forest. The evidence is locked.
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Eight countries. Eight missions. A passport you have to earn.
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No broken glass. No forced locks. Just an empty velvet cushion.
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Every map is wrong. Every error is a clue.
See the books →Feelings stories with built-in conversation starters, and STEM puzzles with three difficulty levels, so a whole class (or a whole family) can use the same book.
How to use the booksStory trailers, puzzles to try and peeks inside the books.