Good Morning Midnight, by Reginald Hill

This is the latest in Hill’s long-running Dalziel/Pascoe series of police
procedurals, and it’s pretty well par for the course: twists, turns, odd
relationships, Andy Dalziel being coarse but effective and Peter Pascoe
being uptight and thorough. Hill always surprises, and this book is no
exception.

More I won’t say, mostly because I read this sufficiently long ago that
the plot is murky; suffice to say that Hill (almost) always does a good
job; if you like this sort of thing, you’ll like the book.