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Number Planet: How Many Cakes are Left?

A book about subtraction

Louise Spilsbury, Author

Emily Cooksey, Illustrator

Series: Number Planet

Imprint: Wayland

Publication date: April 9, 2026

Category: Early learning: numbers & counting

ISBN: 9781526330871

Series: Number Planet

Imprint: Wayland

Publication date: October 22, 2026

Category: Early learning: numbers & counting

ISBN: 9781526330864

This fun picture books helps young children get to grips with subtraction through bold pictures, activities and things to spot on the page.

Leon and Luna are having a magical adventure counting animals all around the world. Through the story, children aged 4 plus will learn about maths concepts including: counting backwards, counting down in fives and removing 10.

Number Planet are picture books that help children explore first maths concepts. Titles in the series cover the topics of Addition, Subtraction, Measurements and Shapes.

Louise Spilsbury

Award-winning author Louise Spilsbury, who also writes under the name Louise Kay Stewart, has written over 250 books for young people on a wide range of exciting subjects. She loves writing children’s books as it gives her the chance to keep learning about new stuff. She lives and works near the coast in South Devon and loves to walk on the beach and swim in the sea after work. Louise won The English Association Margaret Mallett Award for Children’s Non-Fiction 2019 for Rebel Voices: the rise of votes for women.

Emily Cooksey

Emily studied at the Wolverhampton School of Art, achieving a first-class BA Hons degree and a distinction Master’s degree in Illustration. Her work is created digitally and reflects a hand drawn style, inspired by memories of reading picture books as a child.