Fun and pretty fast-paced stuff. Basically your military action thriller (complete with the feeling that the author has access to people who truly knows the business, and looking at the acknowledgements, Maberry does), against Islamic extremists with jihadist tendencies bent on total annihilation of the western civilization, and a very novel biochemical weapon.
Action-packed, but the characters are a little cardboard-ish. If you’re in the mood for an exciting, rollicking good time, go for it. Better than most movies today.