Katie has been writing non-fiction children's books for almost half her life and loves questioning the world from a child's point of view. She's developed some of Usborne's bestselling series, including the See Inside books and Lift-the-flap Questions & Answers.

When she's not writing, she likes drinking coffee, walking on the moors and playing competitive board games with her children.,

Kirsti graduated from Edinburgh College of Art in 2016 and turned her hand to illustrating children's books. She was named Picture Hooks Illustrator of the Year in 2017.

She works from her studio on the outskirts of Newcastle, using a combination of dry and wet media to create her illustrations.