Damon

From Author Wars - https://authorwars.com/publications/damon-253937.html

Overview:

Title: Damon
Author: C. Terry Cline, Jr.
Year: 1976
Publisher: Fawcett Crest
Price: $1.95
Pages: 320
Binding: Paperback
Type: Novel
Title Reference: Damon
Notes: 1st printing as per number line. The back cover has several quotes, including ones by William Castle and Burt Hirschfeld; the tagline is "First THE EXORCIST...then SYBIL...now DAMON", which implies that Sybil was a horror novel when in fact it was a nonfiction book about multiple personality disorder.