Co-written with Steve Bowkett (under the pseudonym Len Beech), this was one of the first books in Virgin's line of Bernice Summerfield novels.
[7] As well as writing fiction, Day has also written several unofficial guide books to television series such as The X Files, Star Trek: The Next Generation and The Avengers.
These were published by Virgin, and co-written with Keith Topping and (with the exception of Shut It!, a guide to The Sweeney and The Professionals) Paul Cornell.
The first book written by Cornell, Day and Topping was Classic British TV, which was released by Guinness Publishing in 1993 and 1996.
His most recent audiobooks are Children of Steel[12] for The Sarah Jane Adventures and The Sleeping Blood for The Companion Chronicles.