from the BBC line have written tie-in novels for the new series, however, including editors Justin Richards and Stephen Cole.) In the climate of renewed interest in the series that followed the 1996 telemovie, the BBC decided to reclaim Virgin's licence when it next came up for renewal and publish its own series of Doctor Who novels. The last two Virgin Doctor Who novels were released in April 1997, bringing to an end almost 25 years of Doctor Who publishing outside of the BBC, with the first two BBC-published novels released in June that same year. Virgin, meanwhile, continued the New Adventures line for several years afterward, focusing upon the Doctor's former assistant, Professor Bernice Summerfield who had been the first companion created specifically for literature, rather than for television. These books (sometimes referred to informally as The Adventures of Benny Summerfield) gained their own fan following and featured appearances by other characters created specifically for the literary world of Doctor Who. The BBC began releasing two new novels every two months, one featuring the ongoing adventures of the Eighth Doctor and the other an "untold" story of an earlier Doctor, referred to as the Eighth Doctor Adventures (EDAs) and Past Doctor Adventures (PDAs) respectively. Although many authors who wrote for the Virgin line returned to write for the BBC series, direct continuity between the two sets of books was discouraged, at least initially. Later, the editors loosened their policy on links between the Virgin and BBC novels, even publishing direct sequels to novels by the other publisher; for example, Justin Richards' Millennium Shock was a sequel to his earlier Virgin Missing Adventure System Shock. For the most part, however, links between the fictional ranges were kept deliberately oblique so as not to alienate new readers. In 2004, the BBC almost halved the frequency of publication from 22 books a year (one EDA and one PDA per month) to 12, each release now coming out once every other month. When the new television series began in 2005, the EDAs came to an end, with future novels featuring the Eighth Doctor to be part of the PDA range. A new line of New Series Adventures began with three Ninth Doctor novels in May 2005. Another three Ninth Doctor novels followed, after which the series continued in 2006 with original novels featuring the Tenth Doctor. As of the fall of 2007 there