a real world point of view
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 fiction featuring the Doctor 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 apparent connection to the Doctor Who universe.