Simon is the award-winning author of the Saxby Smart and Jeremy Brown series.

Simon's ultimate dream is to go the moon, but in the meantime, he lives in Warwick with his wife and children and contents himself with writing in a tiny wardrobe and eating too much chocolate.

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.

Steve Parker is an author, editor and consultant specialising in illustrated information books on the natural world.

Steve is a Senior Scientific Fellow of the Zoological Society of London and has worked on the staff of London's Natural History Museum.

He is based in Suffolk, UK, and has written over 250 books, including dinosaur titles such Extreme Dinosaurs.