Desmond Leslie was famous for punching the theatre critic Bernard Levin in 1962, on live TV, during That Was The Week That Was, watched by eleven million viewers, as Levin had recently written a very unenthusiastic review of the show "An Evening of Savagery and Delight", starring Agnes Bernelle, cabaret singer & Leslie's wife at the time.
During WW2 Leslie was a Spitfire pilot; later he became a pioneer of electronic music & 'musique concrète'. Pevious to this book he co-wrote 'Flying Saucers Have Landed' (1953), with George Adamski, who had claimed sightings of UFOs & later contact with alien spacecraft & their occupants. Adamski is given a disguised portrait in this book.
The book is now scarce and is usually offered at around £50 for a copy in good condition. This copy unfortunately is not in good condition, as both covers are detached.
The spine strip (which is attached to the front cover) has lost the lower 2cm (half the author's name). All edges are worn/rubbed/chipped, and there are creases across corners & marks of age and careless treatment. The paper has tanned, as usual with books published by Digit. There is splitting between pp48/9, and the textblock is slightly skewed. The half-title has a tear of 2.5cm at the top edge; there are a few nicks to edges of pages. Two dark stains are on the lower edges and, less obviously, in the bottom margins of those pages.
However - with some careful work, the cover could reasonably easily be re-glued. I would doubt the cracking could be very satisfactorily repaired, due to the nature of p/b binding.
It's a readable copy, if handled with care.