EastEnders is a long-running British soap opera that has aired on BBC One since 19 February 1985. Since its inception, several spin-offs have been produced, including books, television documentaries, videos, music singles and an album. During the run up to the first episode of EastEnders, interest with the public was already high, something which continued afterwards. EastEnders proved as successful as was hoped for by the BBC in its first years, so they capitalised on it with a number of products. Books Many novels relating to EastEnders have been produced. Between 1985 and 1988, Hugh Miller wrote a series of 12 books focussing on several characters in the show. The books told the characters' backstories from before the show's inception in February 1985. Miller also wrote a series of four books called Teen EastEnders. Similar to the original 12 books, they focussed on teenage characters in the show. A further four novels were written by Kate Lock between 1998 and 2001. Two of these explored the backstories of the characters Grant Mitchell and Steve Owen, with the other two being "secret diaries" of characters Bianca Jackson and Tiffany Mitchell, giving an insight into the characters lives during storylines that were airing at the time. Several non-fiction books have been produced, including EastEnders: The Inside Story in 1987, which was written by the show's creators, Tony Holland and Julia Smith. Non-fiction books Novels Television Several EastEnders spin-off episodes have been produced, which look at the history of some of the characters using flashbacks. They are also often used as a lead up for a character's return to the show or follow characters who have departed from the show in another setting outside the usual location of Albert Square. The first of these was CivvyStreet, which aired in December 1988. It was set in Albert Square during World War II and featured younger versions of some of the soap's characters. Other episodes include Dot's Story, Perfectly Frank, Ricky & Bianca, Pat and Mo and Return of Nick Cotton. Documentaries have also been produced, particularly for the 10th, 15th and 20th anniversaries of the show looking back at the history of the show's inception, its characters and storylines. A behind-the-scenes documentary, EastEnders Revealed, aired regularly on BBC Choice and continued on BBC Three after the closure of BBC Choice. The first episode was in October 1999 and the show continued regularly until October