Well, was it? Probably not. Cuts down on the sequel potential.

His real name: Roger D. Aycock. This was his first novel. Excerpt from a review:

Shannon's instincts are strongly anti-Cubist, especially after he encounters his fiancee, who has become a Cubist, and is horribly changed thereby.

Different kind of Cubists, although that was probably true in art circles as well. The review concludes: "Not really recommended on the whole, but not without some redeeming value."

She has a logo, though. You'll see versions of that scattered through many other covers.