This booktalk, based on an extensive booklist entitled Surprise Endings of Books and Movies — compiled by the members of the Fiction_L online mailing list, used the following specific examples from that longer list.
The Murder League
by Robert L. FishThe Hot Rock
by Donald WestlakeDarkly Dreaming Dexter
by Jeff LindsayNot a Penny More, Not a Penny Less
by Jeffrey ArcherFace of a Stranger
by Anne PerryThe Stupidest Angel: A Heartwarming Tale of Christmas Terror
by Christopher Moore