Ian Haydn Smith is a UK-based writer and editor. As a journalist he has written on film and the arts for numerous media outlets, both print and broadcast. From 2007 to 2012 he was editor of International Film Guide. He has spoken at film festivals and cultural events around the world, both as a critic and as a representative of the British Council. He has interviewed a variety of filmmakers and artists, including Ralph Fiennes, Clint Eastwood, Isabelle Huppert, Alan Bennett, Ang Lee, Agnès Varda, Terry Gilliam and Anton Corbijn. Recent publications include FilmQuake, Selling the Movie, and editing the updated edition of 1001 Movies to See Before You Die. He lives in London.

Dr Gareth Moore is the author of over 200 puzzle and brain-training titles for both children and adults, including The Ordnance Survey Puzzle Book (Trapeze), Enigma: Crack the Code (Michael O’Mara) and The Penguin Book of Puzzles (Michael Joseph). His books have sold in excess of 5 million copies in the UK alone, and have been published in over 35 different languages. He is also a director of the World Puzzle Federation, which oversees the World Puzzle Championships, and a director of the UK Puzzle Association. Find him online at DrGarethMoore.com.