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)"): The series was created by Howard Overman and stars Stephen Mangan as holistic detective Dirk Gently and Darren Boyd as his sidekick Richard MacDuff.
Relevant evidence: No