This list of Douglas' UK works is far more complete, but I'm still open to correction if you spot any mistakes. 5 Includes 'A Guide to the Guide' and the firt four Guide Novels 6 A boced set of the first four 'Guide' novels with new covers 7 A 'limited ediiton' omnibus of both Dirk Gently novels 8 Early copies have rounded corners and magenta page-edging. The original star-shaped cover sticker was qucikly replaced by a round one, then no sticker at all, then the star shape again. 9 Includes two introductions and copious notes by DA and Geoffrey Perkins.
Some copies have a large cover sticker reducing the price.
The US version has about three extra pages in a chapter about the flying party, explaining why 'Belgium' is a rude word. The books several authors include DA's old colleagues Griff Rhys Jones and John Lloyd. Douglas' work has been translated into umpteen languages, and if you go abroad might like to look out for copies, especially as evry country gives the books completely different covers.