This is book 21 of the "Jack Reacher" series.

This note contains spoilers for the book.

A historical one; set while Reacher is still in the Army. He and other top agents, grabbed off into something that looks innocuous, are sent after a rumor of a possible terrorist activity.

The main clue they have is that the messenger said the amount asked was a hundred million dollars. This was so huge they had to take it seriously. In fact, it turned out to be an old load of 10 nuclear warheads of the type used on the Davey Crocket tactical nuclear artillery system; and the way he dangled the clues in front of me made me think of that the very first time it was mentioned, and be sure of it the second. So this one father failed on the "suspense" level, for me.