Steve Lyons’ work in the Warhammer 40,000 universe includes the novellas Engines of War and Angron's Monolith, the Imperial Guard novels Death World, Ice Guard and Dead Men Walking, and the audio dramas Waiting Death and The Madness Within. He has also written numerous short stories and is currently working on more tales from the grim darkness of the far future.

Jenny T Colgan has written 16 bestselling novels as Jenny Colgan, which have sold over 2.5 million copies worldwide, been translated into 25 languages, and won both the Melissa Nathan Award and Romantic Novel of the Year 2013. Aged 11, she won a national fan competition to meet the Doctor and was mistaken for a boy by Peter Davison.

Andrew Lane is a popular and much-loved writer for teens and young adults. He is the author of the Young Sherlock Holmes series, which has been published in forty-four countries.

He has also worked extensively in the extended universe of BBC TV's Doctor Who, and has written three adult crime novels under a pseudonym.

Before becoming a writer, Andrew spent twenty-seven years working for the Ministry of Defence on the fringes of the Intelligence and Counter-terrorism communities. He has been inside several classified intelligence headquarters in the UK and US (and not as a tourist).

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.