I'm only a recent Myron Bolitar fan, having discovered the series a few months ago and devoured them all since. This is, by far, the weakest of the books. The premise was ridiculous, the scope of the plot literally unbelievable, and the ending just pathetic.
Mr. Coben? Tangentially: why on Earth have you created an obviously only-child protagonist, only to slip in throwaway references to a brother and, now, sister? It's simply a stupid choice, especially since you provide no background, no mention of either sibling at all aside from two sentences in the fourth or fifith book and two more in this one.
If you write any more Bolitar books, please return to the actual character we fell in love with--the agent whose criminal entanglements follow believably from his work, his friendships, his life. Not this reasonably well-written but credibility-devoid schlock.