Others, like Harlan Coben ("No Second Chance") and Jonathan Kellerman ("A Cold Heart"), whose new books arrive later this month, are much more insightful, sensitive and mild. "Bear with me," remarks Mr. Kellerman's Dr. Alex Delaware, a psychologist, with his typical patience. "I need to get some context." Then there is Michael Connelly's Harry Bosch (back in "Lost Light"), who has never unearthed an injustice that didn't make him moody.