Seize the Day — Richard Marcinko; Jim DeFelice

When Marcinko's "friend," the head of the CIA, asks him to spend a little quality time in Cuba, the Rogue Warrior finds there's no way to say no. Once there, Marcinko and company discover that Fidel Castro is on his deathbed. Which wouldn't be so bad, except that he's planned a catastrophic surprise for the U.S. as his going-away present. The Rogue Warrior must find out the nature of that little surprise and thwart it before Castro kicks the bucket.