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.

Elen Caldecott graduated with an MA in Writing for Young People from Bath Spa University and was highly commended in the PFD Prize for Most Promising Writer for Young People.

Before becoming a writer, she was an archaeologist, a nurse, a theatre usher and a museum security guard. Elen's debut novel, How Kirsty Jenkins Stole the Elephant, was shortlisted for the Waterstone's Children's Prize and longlisted for the 2010 Carnegie Medal.

Steve Cole is a best-selling children’s author whose sales exceed three million copies. His hugely successful Astrosaurs young fiction series has been a UK top-ten children’s bestseller and been published widely internationally. His several original Doctor Who novels have also been bestsellers.

An original comedy, fantasy and adventure writer, Steve’s work includes a broad range of books, most recently the Secret Agent Mummy series for younger readers, Stop Those Monsters! and the explosive Young Bond titles Shoot to Kill and Heads You Die, with a further adventure for the teenage James Bond planned for publication later this year.

Much in demand for his energetic performances at events, Steve has appeared at Edinburgh, Hay, Cheltenham, Oxford, Bath, YALC and World Book Day’s Biggest Book Show on Earth. He has toured schools in Europe, America, the UAE, Australia and New Zealand, and featured at sci-fi and Doctor Who conventions from London to Los Angeles.

Jacqueline Rayner is the author of over 40 books and audio plays, including number one bestseller The Stone Rose, the highest-selling Doctor Who novel of all time, and two Doctor Who ‘Quick Reads’ for World Book Day.

She lives in Essex with her husband and twin sons and writes a regular column for Doctor Who Magazine about family life.

Mike Tucker is an author specialising in books for children and young adults, and has written several original ‘Doctor Who’ novels, a number of Merlin novelisations, and original fiction for other shared universes. He has also written numerous factual books relating to film and television, including a history of the BBC’s Visual Effects Department, where he used to work.

Alongside his writing, Mike works as a Visual Effects Designer, and his company - The Model Unit - recently won a BAFTA Craft Award for its miniature effects work on the 50th anniversary Doctor Who episode The Day of the Doctor.