Mark Griffiths (Author) Mark Griffiths grew up in North Wales. At age 17 he sold his first comedy material to Radio 4. At 18 he was writing for Smith & Jones on BBC 1. He was one of the writers on Charlie Brooker's TV series and book TV Go Home. To date he has written five children's books. He studied philosophy at the University of Reading. His interests include tea-drinking and natural history. He lives in Manchester and is mostly found in charity shops.

His web site is www.markgriffithsbooks.co.uk and you can find him on Twitter: @markgriffiths42 Mark also writes the SPY TOYS books under the name Mark Powers. Doctor Who (Author) Doctor Who is the longest running sci-fi show in the world, and a flagship BBC property. First appearing on air in 1963, it follows the adventures of the Doctor, a Time Lord who travels through time and space, fighting alien monsters and saving the universe.