Second Honeymoon, by James Patterson

Synopsis: A walk down the aisle, a resort hotel, a drink on the beach...for these unlucky couples, the honeymoon's over.

A newlywed couple steps into the sauna in their deluxe honeymoon suite—and never steps out again. When another couple is killed while boarding their honeymoon flight to Rome, it becomes clear that someone is targeting honeymooners, and it's anyone's guess which happy couple is next on the list.

FBI Agent John O'Hara is deep into solving the case, while Special Agent Sarah Brubaker is hunting another ingenious serial killer, whose victims all have one chilling thing in common.

As wedding hysteria rises to a frightening new level, John and Sarah work ever more closely together in a frantic attempt to decipher the logic behind two rampages.

Thoughts: A good story, but not really a James Patterson quality story. I suspect that many of the novels with co-authors have very little actual Patterson work in them, and just have his name on the cover to sell them.
Aside from that, I enjoyed the story, and the way the two cases were woven together. One killer is known to the readers from the beginning, but the other was quite surprising.