Thomas writes and illustrates his own stories, as well as illustrating books written by other authors, including his wife Helen Docherty (The Snatchabook and The Knight Who Wouldn't Fight, Alison Green Books), Julia Donaldson (Bombs & Blackberries and Chariots & Champions Hodder) and Jenny Colgan (Polly and the Puffin series, Little Brown).
His work has been nominated for many awards, including the prestigious Kate Greenaway medal, and published all over the world. Thomas and Helen’s award winning picture book The Snatchabook has been translated into 18 languages.
When he was at school, Thomas was always getting into trouble for doodling in his rough book. He now feels very lucky to be able to draw pictures for a living, and make up stories to go with them. Alongside his own work, Thomas dedicates a lot of time to working with school children and young adults, helping them write and illustrate their own stories.