Tony Bradman has worked in children's books for over 30 years as a writer, a reviewer, and an editor of anthologies.

His books include the Dilly the Dinosaur picture-book series, which sold 2 million copies worldwide.Tony is lead author for Project X, OUP's reading scheme for boys up to Year 6.

He has been a judge for the Smarties Book Prize, Booktrust Teen Awards and is chair of the Siobhan Dowd Trust. Anglo-Saxon Boy is his second novel for Walker. He lives in Beckenham, Kent.

Sarah grew up in Anglesey, North Wales. She studied illustration at the University of the West of England, in Bristol, and hasn't looked back since.

Sarah has created many books, working for a large variety of publishers, including illustrating the Rumblewick series, which has sold worldwide and is under movie option with DreamWorks.

Her Princess series, written by Caryl Hart, has sold over 220,000 copies worldwide. Sarah lives in Bristol with her husband, two children and a grumpy guinea pig.