"A Labor of Lust" or How Her Boyfriend Was Changed Into a Furry, Drooling Creature

I haven't read "A Labor of Lust" but judging from the cover, I'd be damned interested in what's going on. Let's break it down. We've got a naked woman chained at the neck. In the background, we've got a hairy 70's dude being injected by a doctor. Same guy presumably morphs from hairy 70's dude to hairy, drooling creature in cage. Woman looks at hairy, drooling thing with utter horror. If that's not a winning plot formula, I don't know what is. Cover art by Ed Smith