I really like Harlan Coben writes. He makes you care about the characters, both the major and the minor ones. He keeps the pace pitch-perfect. And his observations about society and families are spot-on. No wonder this book was difficult to put down.
In the minus column, I do think this novel is ever so slightly guilty of self-plagiarism, the way it smacks of Just One Look with a pinch of Hold Tight. Still, if you have to repeat story lines, those two novels are so good, they're definitely worthy of the honour.