Some Say Love It is a Razor

In the early and mid Eighties Zebra cranked out a handful of paperbacks that featured photos of knives slicing through various fruit, and in one case, a rose—not too obvious now! You'll recognize a few names: Joe Lansdale's first novel, Act of Love; two from hack supreme William W. Johnstone; and two from "Philip Straker," an pseudonym of Edward Lee, who would become a prolific extreme horror author in later years, and from what I can tell, he has disowned these two early titles.

According to various Goodreads and online reviews, these are more police procedural/serial killer thrillers, and at least one, Without Mercy by "Leonard Jordan"—another pseudonym, this one used by prolific pulp writer Len Levinson—is worth a read.