Lee Child - Gone Tomorrow

Suicide bombers are easy to spot. They give out all kinds of tell-tale signs. Mostly because they are nervous. By definition they are all first-timers.

There are twelve things to look for:

New York City subway, two o'clock in the morning. Jack Reacher studies his fellow passengers. Four are OK. The fifth isn't. He ticks off every bullet point on the list as the train brakes for Grand Central Station.