The Shapes Trilogy Books in Order

Triangle decides to play a sneaky trick on his friend Square. Their encounter turns simple geometric characters into participants in a disagreement about mischief, friendship, and what happens when a prank does not go as planned.

Square tries to create something perfect for his friend Circle, but the task proves harder than expected. Their encounter explores the difference between making things, being called an artist, and feeling certain about one's own abilities.

Circle makes a rule for a game with her friends Triangle and Square, but Triangle breaks it and needs rescuing. Their adventure explores friendship, fear, and the uncertainty that follows venturing somewhere one has been warned against.