After his death in 2001, Douglas Adams's papers were loaned to his old Cambridge college, St John's. Reproduced here, in facsimile form and in close association with Adams’s family and literary estate, 42 is a full-colour, large-format hardback that follows Adams career from early collaborations with Graham Chapman to his work on Doctor Who, through the Hitchhiker years, Dirk Gently, his groundbreaking non-fiction book Last Chance to See and his later digital work. Alongside this are details of projects that never came to fruition like a proposed theme park ride and a TV series provisionally entitled The Secret Empire.

Edited by Kevin Jon Davies, who has worked on a number of Hitchhiker-related projects and had a personal friendship with Adams spanning more than twenty years.