This is a must read for any fan of the genre. McNab's writing has got better and better with each of his books, and his realism and 'been there, done that' aura is unmatched.
I became a fan after reading Bravo Two Zero and Immediate Action. I greatly anticipated his foray into the fictional world, and have not been disappointed. Now comes Liberation Day, his 5th (?) Nick Stone adventure.
The realism of McNab's writing is what sets it apart. No gadgets, no satellites, no giant technological leaps. His characters are believable, they do believable things, and they use common tools. His Leatherman is his best friend.
If you've never read McNab, then I highly recommend him to you. Do yourself a favour and read his books in order. You'll realize just how far short the rest of the pack has fallen.