TOP NOTCH NYMPH
The author? Dana Furstenbed. Published by Carlisle Communications in 1980, which explains the book's groovy disco typeface.
There is a drinking game in which this book is the central prop. Each participant opens the book to a random page and reads out loud. If the paragraph they read is not unspeakably filthy, they take a shot.
It takes a long time to get drunk playing this game. Sample paragraph: "'Oh, Keith, that was good,' she finally was able to whisper. 'Did you swallow much gism?'"