Stephen King "Mr Mercedes" His first crime/detective novel?

Stephen King has written three very different novels in the past 18 months - the nostalgic "Joyland", "The Shining" sequel to "Doctor Sleep" and now this, "Mr Mercedes", his first detective novel. The dedication is to James M Cain.
You sometimes think you are reading a Dean Koontz crime/thriller - the psycho killer, the quirky dissimilar characters, misfits, a middle-aged love story. But King's black humour and wry observations are aplenty. The reader as always, is in good hands.
The overweight, retired detective, Bill Hodges, is a fine creation. There are two quick references to vintage King (creepy "Pennywise" and a haunted Plymouth). No Maine locales in this novel, King chooses the Midwest for this yarn. The race against time finale (think "Black Sunday") meant I read into the early hours to finish the book.
A light weight, engrossing read. Recommended.
Scribner 448 pages