Virgin Decalogs were short story anthologies published by Virgin Books, contemporaneous with its Virgin New Adventures and Virgin Missing Adventures series of books. The first three volumes featured the first seven incarnations of the Doctor. With Virgin Books having lost its license to publish Doctor Who-based fiction in 1997, Decalog 4: Re:Generations concerned the family and history of companion Roz Forrester. Decalog 5: Wonders strayed even further from its origins, with only one of the ten stories featuring Bernice Summerfield and the rest having no direct mention of the Doctor Who universe.
BBC Books continued the Decalog format of multi-Doctor short stories by launching the Short Trips series of books, which was later taken over by Big Finish Productions' publishing arm.