Having been in the military and working in law enforcement now, I can say that Marcus knows his stuff! The dialogue and mindset of the characters is spot on. The plots are very believable. Air Marshals was written in the 90's when most Americans had forgotten about hijackings. Having worked as an Federal Air Marshal, Marcus has a great deal of credibility. Great action scenes and characters. I could rave on and on about all his books, but this one is special. Could have been a wake call to a lot of people. I have it on my laptop and bought it again from Amazon for my phone. If anyone buys this book and doesnt like it. Drop me a line, I'm curious why. I'd recommend it to everyone I know!