Douglas Adams created all the various and contradictory manifestations of The Hitchhiker's Guide to the Galaxy: radio, novels, TV, computer game, stage adaptations, comic book and bath towel. He lectured and broadcast around the world and was a patron of the Dian Fossey Gorilla Fund and Save the Rhino International. Douglas Adams was born in Cambridge, UK and lived with his wife and daughter in Islington, London, before moving to Santa Barbara, California, where he died suddenly in 2001.

Chris Riddell, the 2015-2017 UK Children's Laureate, is an accomplished artist and the political cartoonist for the Observer. He has enjoyed great acclaim for his books for children. His books have won a number of major prizes, including the 2001, 2004 and 2016 CILIP Kate Greenaway Medals. Goth Girl and the Ghost of a Mouse won the Costa Children's Book Award 2013. His work for Macmillan also includes the bestselling Ottoline books, The Emperor of Absurdia, and, with Paul Stewart, the Muddle Earth books,theScavengerseriesand the Blobheads series. Chris has been honoured with an OBE in recognition of his illustration and charity work. He lives in Brighton with his family.