Dirk Gently's Holistic Detective Agency by Doulgas Adams, author of The Hitchhiker's Guide to the Galaxy, is a much-loved cult classic, that has spawned radio dramas, television, theatre and comic book adaptations across the globe.
What do a dead cat, a computer whiz-kid, an Electric Monk who believes the world is pink, quantum mechanics, a Chronologist over two hundred years old, Samuel Taylor Coleridge (poet), and pizza have in common?
Apparently not much; until Dirk Gently, self-styled private investigator, sets out to prove the fundamental interconnectedness of all things by solving a mysterious murder, assisting a mysterious professor, unravelling a mysterious mystery, and eating a lot of pizza - not to mention saving the entire human race from extinction along the way (at no extra charge).

The second Dirk Gently book by Douglas Adams, The Long Dark Tea-Time of the Soul is a witty detective story perfect for fans of his phenomenallysuccessful The Hitchhiker's Guide to the Galaxy.
When a passenger check-in desk at Terminal Two, Heathrow Airport, shot up through the roof engulfed in a ball of orange flame, the usual people tried to claim responsibility. First the IRA, then the PLO and the Gas Board. Even British Nuclear Fuels rushed out a statement to the effect that the situation was completely under control, that it was a one in a million chance, that there was hardly any radioactive leakage at all and that the site of the explosion would make a nice location for a day out with the kids and a picnic, before finally having to admit that it wasn't actually anything to do with them at all.