From August 1st-August 31st, 2009, buy Brian Haig's Secret Sanction ($6.39) and receive a free download of Mortal Allies ($6.39). Secret Sanction is the first novel by Brian Haig, military strategist and son of former Secretary of State Alexander Haig, but he's written quite a few since.
This one works like the other B1G1F offers from Amazon - only click and order Secret Sanction; Mortal Allies will also appear in your library and on your Kindle, but you don't click the buy button for it (I don't believe it appears on your receipt/order summary either, which I don't like).
Secret Sanction
Word of Honor meets A Few Good Men in this gripping thriller that pits the Green Berets, the CIA and the U.S. government against a top Army lawyer conducting an investigation everyone wants quashed.
Mortal Allies
Army lawyer Sean Drummond has gotten himself in way over his head-with a case that challenges his deepest fears and a co-counselor who challenges just about everything else.