Oops! I should have added this to my previous post.
For anyone with an interest in books about Hammer, including film crit and tie-in paperbacks, do yourself a favour and visit Jon Older's excellent site
The Hammer Books Library. Some great film tie-in cover art is on display. You'll also find images of most of the books mentioned in this thread (CL bios, PC bios, etc...), with the exception of
X-Certificate and its variations.
Cheers!