From the dynamic, dream team of Jon Klassen and Mac Barnett comes the final instalment in the hilarious shape trilogy.

“Simple shapes and succinct story express big ideas. Makes us consider fear of strangers, the power of the imagination, being brave and standing by friends” Sunday Times

Triangle and Square are visiting Circle, who lives at the waterfall. When they play hide-and-seek, Circle tells the friends the one rule: not to go behind the falling water. But after she closes her eyes to count to ten, of course that's exactly where Triangle goes. Will Circle find Triangle? And what OTHER shapes might be lurking back there?

"“An elegant picture book in which simple shapes and succinct story express big ideas. Here a game of hide-and-seek makes us consider, for starters, fear of strangers, the power of the imagination, being brave and standing by friends.”" - The Sunday Times

"“Clever and extremely funny.”" - The Bookseller, Children’s March Previews

"“[…] every bit as funny and stylish as its predecessors.”" - Mini Travellers

"“This is a lovely book to read at bedtime. The use of shapes as characters really keeps children engaged, and the mystery towards the end of the book encourages children to use their imagination. Even as an adult I found myself wanted to know more about what was going on! I didn’t expect a mystery in a children’s picture book!”" - Me, Him, The Dog, And the Baby