Without Fail is the sixth book in the Jack Reacher series written by Lee Child. …
Skilled, cautious, and anonymous, Jack Reacher is perfect for the job: to assassinate the vice president of the United States. Theoretically, of course. A female Secret Service agent wants Reacher to find the holes in her system, and fast – because a covert group already has the vice president in their sights. They’ve planned well. There’s just one thing they didn’t plan on: Reacher.
The sixth time’s a charm for thriller meister Child, whose latest escapade starring ex-military cop Jack Reacher is handily his most accomplished and most compelling to date. …
Sure the plot is unbelievable. But I’d agree that this was the best of the series, so far.
In fact I’ve downloaded the first 17/20 audiobooks in the series (so far) and am working my way through them. 🙂
Rick McCharles 
I love Lee Child. I will get a copy of this one