Cressida Cowell is the author and the illustrator of the bestselling How to Train Your Dragon book series which has sold over 8 million books worldwide in 38 languages. It is also an award-winning DreamWorks film series, and a TV series shown on Netflix and CBBC. The first book in Cressida's new series, The Wizards of Once (also signed by DreamWorks), is a number one bestseller.

Cressida is an ambassador for the National Literacy Trust and the Reading Agency and a founder patron of the Children's Media Foundation. She has won numerous prizes for her books, including the Gold Award in the Nestle Children's Book Prize , the Hay Festival Medal for Fiction, and Philosophy Now'magazine's 2015 Award for Contributions in the Fight Against Stupidity.

She grew up in London and on a small, uninhabited island off the west coast of Scotland and she now lives in Hammersmith with her husband, three children and a dog called Pigeon.

Read an interview with Cressida here.

Read a sample of The Wizards of Once, and hear the first chapter read by David Tennant here.

Book cover for The Wizards of Once

The Wizards of Once

From the bestselling author of How to Train Your Dragon comes an exciting high-adventure series - set in an ancient, magical time, full of Wizards, Warriors, Giants and Sprites. #1 Sunday Times BestsellerWinner of the Blue Peter Book Award...

Book cover for The Wizards of Once: Twice Magic

The Wizards of Once: Twice Magic

From the bestselling author of How to Train Your Dragon comes an exciting high-adventure series - set in an ancient, magical time, full of Wizards, Warriors, Giants and Sprites. This was once the story of a young boy Wizard and a young girl Warrior who had been taught since b...