I found the book in England this morning for $83 (40 GPB!), still not cheap but could not
resist, it is the most on-topic book I ever met.
When I have it we may arrange to scan the rest of it (probably in september
though...)
It seems he also wrote "Electronics in Music" but I only find it around $250!
Here are two descriptions (that differ a bit):
http://www.isbn.pl/A-F-C-Judd/