I don't think the problem is that people don't read enough mystery books, but that people don't read.
Thomas PerryThe characters you refer to as predatory and unsavory are useful. They're the ones who make a novel into a thriller. They're active, and most of the common virtues, the signs of a good person, are not.
Thomas PerryIf I don't have a project going, I sit down and begin to write something - a character sketch, a monologue, a description of some sight, or even just a list of ideas.
Thomas Perry