Robert Upton. Who’d Want to Kill Old George? (1977) 219 pp.
San Francisco private investigator Amos McGuffin is hired by eccentric, wealthy, New Age convert George Curtis to prove that his estranged wife Lydia is having an affair. Although McGuffin doesn’t usually do divorce work, this case seems like easy money—and lots of it. When he goes to deliver his information to Curtis at his Sausalito home, he finds that his client has been murdered. The police think that Curtis surprised a burglar; McGuffin doesn’t buy that story and sets out to find the killer. Soon McGuffin is having an affair of his own with Lydia and is chasing leads from Big Sur to Mendocino trying to find out why anyone would want to kill old George.