Worst Case by James Patterson & Michael Ledwidge

Little Brown provided a copy of this book for review. I enjoy most of Patterson's work, but this one is special.

The murderer is a madman. He's on his last mission in life, and he intends to make his point, even if it takes death to do it.

He kidnaps children of big executives and then doesn't ransom them. He asks them questions. And for each question they answer incorrectly, he punishes them. Failing the exam means they die.

Michael Bennett can't understand how someone can kill children. Nor can he find any reason why it's those children or who could be the killer. But he doesn't give up looking.

Agent Emily Parker is sent to help him and it takes their special skills and knowledge to get close to the killer.

It's a twisting mystery with a good plot and lots of action. It was also a very good read.