I normally do not read fiction - but to take on vacation I bought Castigo Cay by Matthew Bracken. Very good book, well written by a writer who obviously knows something about firearms.
I liked it so much I bought what I think is his first boo, Foreign Enemies and Traitors.
Only about half through it but it too is a good, easy read. I recommend either and, since my wife gave me a Kindle Fire for Father's Day, as soon as I figure out how to use it, I will be reading his other books.