Simon Guerrier is co-author of Whographica and The Scientific Secrets of Doctor Who for BBC Books, and has written countless Doctor Who books, comics, audio plays and documentaries.

In 2016, Simon was a guest on Front Row and The Infinite Monkey Cage on Radio 4, and with his brother Thomas, makes films and documentaries – most recently John Ruskin's Eurythmic Girls.

Dan Abnett has written over fifty novels, including Anarch, the latest instalment in the acclaimed Gaunt’s Ghosts series. He has also written the Ravenor and Eisenhorn books, the most recent of which is The Magos.

For the Horus Heresy, he is the author of Horus Rising, Legion, The Unremembered Empire, Know No Fear and Prospero Burns, the last two of which were both New York Times bestsellers.

He also script ed Macragge’s Honour, the first Horus Heresy graphic novel, as well as numerous audio dramas and short stories set in the Warhammer 40,000 and Warhammer universes. He lives and works in Maidstone, Kent.

Robert Shearman is an award-winning writer for television, radio and the stage, as well as several acclaimed short story collections, the first of which won him a World Fantasy Award, and Doctor Who audio scripts for Big Finish Productions.