USA Today ran a short but wonderful review of The Accident Man in today's (2/21/08) edition. You can see the full review here.
A nice quote:
Cain gets high marks for a creative yet easily believable story line that only adds fuel to the fire about what really happened to Diana — and who's to blame. Cain boosts the story's excitement through a stunning imagining of the lives and minds of paid assassins and Russian gang members.