Co-Author bio: Simon Guerrier has been a freelance writer since 2002. His last two books are Whographica (with Steve O'Brien and designer Ben Morris, BBC Books 2016) and The Scientific Secrets of Doctor Who (with Dr Marek Kukula, BBC Books 2015). Guerrier also produces documentaries and writes regularly for Doctor Who Magazine, the Lancet Psychiatry and other publications. He also works on a part-time basis for the House of Lords, has a masters degree in science fiction (University of Reading, 1998), a GCSE in astronomy, and a higher certificate in wines and spirits from his days working in the wine trade.
City/state of residence: United Kingdom

Co-Author bio: Steve O'Brien has been a film and TV journalist for 20 years. He began on Cult TV magazine before moving to SFX. He writes regularly for SFX, Sci-Fi Now, Digital Spy, and Doctor Who Magazine. O'Brien has contributed to many TV and DVD documentaries about cult TV and movies. In 2016 he co-authored Whographica.
City/state of residence: United Kingdom