Death Tour by David J. Michael (1978): Come On Along, Honey
It might look like a Halloween mask on the cover but it's got a New York Times Book Review blurb! How could you resist Death Tour? It's an alligators-in-the-sewers deal by David J. Michael (don't know anything about him) but I haven't read it. I was kinda surprised to find a handful of reviews on the novel. I even found something on the artist, one Ivan Punchatz. So now you can enjoy your holiday well-contented with horror fiction lore! You're welcome.