Question: Which book, which is described by the author on its cover as a "thumping good detective-ghost-horror-who dunnit-time travel-romantic-musical-comedy-epic, was turned into a comic science fiction television series called Dirk Gently?
Sentence (from "Dirk Gently (TV series)"): Recurring actors include Helen Baxendale as MacDuff's girlfriend Susan Harmison, Jason Watkins as Dirk's nemesis DI Gilks and Lisa Jackson as Dirk's receptionist Janice Pearce.
Relevant evidence: No