who's the sleuth

This sort of thing annoys me. I've just finished The Widening Stain, by Morris Bishop (writing as W. Bolingbroke Johnson), a rather amusing (though not, as stated by the blurb, a side-splitter) murder mystery set at an East Coast university. If you happen to be reading it, spoilers ahead.

The blurb also says

A debonair English professor with a penchant for limericks turns sleuth when bodies show up in the stacks at an Ivy League university. Professor Parry was tall, blond, and handsome. His only flaws were his thinning hair and an uncontrolled urge to inject original limericks into every conversation. When a black-haired, black-eyed professor of French (whose accent was said to take on the flavor of garlic when she got excited) is found dead in the college library, Parry has personal reasons to look into her death.

Parry - interesting that he's "an English professor" and Lucie Coindreau is "a professor of French" when he's American and she is French... but I digress. Parry does most decidedly not "turn sleuth". In fact, at the end of the book he still doesn't really understand how the real sleuth solved the mystery, and he never wanted her to try. Yes, her. Gilda Gorham, who doesn't rate a mention on the back of the book, is the main character, the general POV-character except for a few scene-setting excursions into authorial omniscience, and the amateur detective. Parry is enamored of her and asks her to marry him at the end of the book, but she turns him down in favor of someone else.

I can't understand why the blurb made it seem like he was the sleuth, when he is really only one of three or four major supporting characters. I'm hoping it's because they thought "a debonair English professor" sounded more marketable than "an academic librarian". I'm hoping it's not because they didn't want to advertise a cozy with an amateur detective who is a woman.