So Vile a Sin — Ben Aaronovitch

The longest wunning science fiction TV series, Dr. Who has delighted fans on both sides of the Atlantic since 1963. Now, the New Adventures series, original, full-length novels which continue the Doctor's travels in time, presents So Vile a Sin, which culminates in the final confrontation between Dr. Who and the psi-powered Brotherhood, and marks the departure of the Doctor's companion, Roz Forrester.