Quotes from book
Dirk Gently's Holistic Detective Agency

Dirk Gently's Holistic Detective Agency is a humorous detective novel by English writer Douglas Adams, first published in 1987. It is described by the author on its cover as a "thumping good detective-ghost-horror-who dunnit-time travel-romantic-musical-comedy-epic".

“This was the evening of the last day of Gordon Way's life”
Dirk Gently's Holistic Detective Agency (1987)
Context: This was the evening of the last day of Gordon Way's life … The weather forecast hadn't mentioned that, of course, that wasn't the job of the weather forecast, but then his horoscope had been pretty misleading as well. It had mentioned an unusual amount of planetary activity in his sign and had urged him to differentiate between what he thought he wanted and what he actually needed, and suggested that he should tackle emotional or work problems with determination and complete honesty, but had inexplicably failed to mention that he would be dead before the day was out.

“There is no point in using the word 'impossible' to describe something that has clearly happened.”
Source: Dirk Gently's Holistic Detective Agency

“High on a rocky promontory sat an Electric Monk on a bored horse.”
Source: Dirk Gently's Holistic Detective Agency

“He felt like an old sponge steeped in paraffin and left in the sun to dry.”
Source: Dirk Gently's Holistic Detective Agency

“There are some oddities in the perspective with which we see the world.”
Speech http://www.biota.org/people/douglasadams/index.html at Digital Biota 2 http://www.cyberbiology.org/, Cambridge, UK, (1998)
Source: Dirk Gently's Holistic Detective Agency
Context: There are some oddities in the perspective with which we see the world. The fact that we live at the bottom of a deep gravity well, on the surface of a gas covered planet going around a nuclear fireball 90 million miles away and think this to be normal is obviously some indication of how skewed our perspective tends to be, but we have done various things over intellectual history to slowly correct some of our misapprehensions.

“The more Susan waited, the more the doorbell didn't ring. Or the phone.”
Source: Dirk Gently's Holistic Detective Agency

“Dirk was, for one of the few times in a life of exuberantly prolific loquacity, wordless.”
Source: Dirk Gently's Holistic Detective Agency