I've been a fan of Marcus' ever since he wrote With a Vengance. I even have signed hardcopies!
It was such a treat when he released Air Marshals. It was also my first foray into e-books. At first I was hesitant, but I found I could get just as engrossed on a little four-inch screen as I could on a real book.
Air Marshals scared the s%&t out of me. It was so realistic and gritty. It made me really appreciate the sacrifices the Air Marshals and their support staff undertake on a regular basis. Also, it underscores the monotony they have 99% of the time while still being ready to leap into action for that 1% when it really counts.
Enjoy this and Marcus' other books, but make sure you have plenty of snacks and a comfortable chair because you're not going to want to stop once you begin!