I first read this many years ago and, while I remember quite liking it, I didn't remember much of the plot apart from the occasional scene. Reading it again, the book has proved to be much, much better than I remembered.

Dirk Gently's Holistic Detective Agency is pure Douglas Adams - silly, smart and surreal in equal measure and and it's a novel that takes a collection of seemingly random events and connects them in a manner that is... well, holistic.

Some of the references are a little dated, but the book as a whole is a superb read and one that was well worth coming back to.