Reddit mentions of Threats: A Novel

It's about a man who goes crazy after his wife dies under mysterious circumstances. It's a mystery on the surface but you'll find more red herrings than reality. Also a crazy dentist who sees worms in the teeth of infants. (Sadly no uttchuktes are involved.) Since you asked, here's a link. Also likely found at a big-enough library near you.

Thanks for asking! I don't want to seem advertorial but I have some extra copies I could send people who come close to a solve if anyone's interested.