Theia: The Little Planet Who Made the Seasons

Written by Saskia Gwinn

Illustrated by Katie Cottle

Agent : Charlotte Atyeo

Children •

Non-Fiction

Theia: The Little Planet Who Made the Seasons

Publication date :

September 2026

Post Wave (World All Languages)

Rights sold

PRH Grupo Editorial Portugal (Portuguese/Portugal)
Ediciones Larousse (Spanish/Latin America)

Meet Theia – a small planet with a big destiny. She didn’t just crash into Earth… she changed it forever!

Travel back 4.5 billion years, when Theia slammed into young Earth. From that colossal crash, the Moon was born. Earth began to wobble… and the seasons came to life.

This hilarious, science-packed com-book adventure is perfect for curious, fact-loving readers ages 7–9.

Other books by Saskia Gwinn

'Scientists Are Saving The World!' by Theia: The Little Planet Who Made the Seasons

'I Am NOT the Easter Bunny!' by Theia: The Little Planet Who Made the Seasons

'Secret Stories of Nature: A Field Guide to Uncover Our Planet's Past' by Theia: The Little Planet Who Made the Seasons

'Mathematicians are Counting the Stars!' by Theia: The Little Planet Who Made the Seasons

'Along Came a... Burp!: A fart-packed science story all about the human body' by Theia: The Little Planet Who Made the Seasons

'I'm Building a Nest' by Theia: The Little Planet Who Made the Seasons

'Teeny Tiny Science: I See a Cloud' by Theia: The Little Planet Who Made the Seasons

'Secret Stories of Lost Beasts: A Field Guide to Uncover Earth’s Ancient Animals' by Theia: The Little Planet Who Made the Seasons

'Teeny Tiny Science: I See a Star' by Theia: The Little Planet Who Made the Seasons

'I'm Joining the Herd' by Theia: The Little Planet Who Made the Seasons

'Secrets from the North Pole' by Theia: The Little Planet Who Made the Seasons

'Along Came a... Rainbow!: A wet and windy weather story' by Theia: The Little Planet Who Made the Seasons

'Next Door There is a Dinosaur' by Theia: The Little Planet Who Made the Seasons

'Who Said POO?' by Theia: The Little Planet Who Made the Seasons

'Teeny Tiny Science: I See a Tree' by Theia: The Little Planet Who Made the Seasons

'What a Bottom!' by Theia: The Little Planet Who Made the Seasons

'Secret Stories of Space: A Field Guide to Uncover Our Incredible Universe' by Theia: The Little Planet Who Made the Seasons

'Teeny Tiny Science: I See a Dinosaur' by Theia: The Little Planet Who Made the Seasons

'Secrets from the Fairy World' by Theia: The Little Planet Who Made the Seasons