Doctor Who: Twelve Doctors of Christmas

Richard has written over forty books for children and began his writing career as an in-house author, working on non-fiction, first at Usborne Publishing, and later at Ladybird Books. Since going freelance, he has created original stories to support a wide range of exciting licensed properties such as Doctor Who; Wallace and Gromit; Transformers; MI High; Captain Scarlet and The Incredibles. Richard lives in Leicestershire with his wife and two young children. Richard's rather unfortunate surname comes from a village in South Yorkshire, where his ancestors lived. It means 'a dwelling with dried cow pats for roofing'. Lovely.

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'.

Gary Russell was one of the script editing team for Doctor Who, Torchwood and The Sarah Jane Adventures, and is the author of many novels and reference books in the Doctor Who range. A former editor of Doctor Who Magazine, he also was the producer of Doctor Who audio dramas for Big Finish Productions for eight years. He lives in Cardiff.