So Long and Thanks for all the Fish Signed by Douglas Adams first edition 1984

London: Pan Books Ltd., 1984 
 
8vo., black boards with backstrip lettered in silver; together in the dust jacket featuring a holographic image of an elephant seal and a dinosaur; pp. [vi], 7-191, [i]; a near-fine copy, slightly bumped to foot of spine, a couple of trivial spots to the upper edge; ink stamp ‘419’ to the ffep relating to the queue number for the event; aside from very minor shelf-wear to jacket, fine. 
 
First edition, signed by the author, and dated in the year of publication. Loosely inserted is also a flyer from the signing at Forbidden Planet, London, on Saturday 1st December [1984]. 
 
The fourth book in the Hitch Hiker’s series, the book marks a shift in tone from Adam’s previously cynical depiction of modern technology. Adams had purportedly been taken to a computer fair, in which he became enamored with the first model of the Macintosh, and became one of the first people in the UK to own a Mac. 
 
“So long and thanks for all the fish” was the dolphin’s final message as they departed Earth, just before it was destroyed to make way for a hyperspace bypass.