Jonathan Morris is a long-standing contributor toDoctor Who Magazine and has written five Doctor Who novels and over 70 audio dramas for Big Finish Productions. He has also authored documentaries for the Doctor Who DVD range and contributed to The Scientific Secrets of Doctor Who and The Shakespeare Notebooks. Outside of Doctor Who, he's written for various TV comedy shows and has had numerous sitcom scripts optioned and piloted. This is his first monster book.

Penny CS Andrews is a writer, performer, activist and academic researcher. They are non-binary, hence the singular they, and have presented at conferences from across the world. Penny has been interviewed by theGuardian, ITV and BBC Radio 4 amongst others about autism, though mostly they talk about Doctor Who, pop culture, politics, fandom and Ed Balls.

Lee Johnson is a freelance illustrator of books and audio dramas. He has a passion for film posters, using a cinematic style to give his artwork maximum impact while staying true to the aesthetics of the story. He illustrated Doctor Who: The Complete History (2015-2019) for Panini UK and Hachette Partworks, Doctor Who: The Brilliant Book (2010-2011) for BBC Books, and Blake's 7 for Big Finish Productions.

Paul Lang is the former Art Editor at Doctor Who Adventures and author of the 2017, 2018 and 2019 Doctor Who Annual. Lang also designed and helped to devise the critically-acclaimed Brilliant Books, and also designed The Tardis Handbook, The Dalek Handbook, The Time Traveller's Almanac, A History of the Universe in 100 Objects and the celebratory 50th anniversary book, The Doctor - His Life and Times.