Hart's War is a 1999 novel by John Katzenbach. This author was recommended to me by The Younger Son in response to my opinion that the Baldacci book I read was dreck. He loaned me 2 Katzenbach books, and this is the second one. Both have been entertaining and readable, and I'll pick up more by this author as I come across them. A nice change from Baldacci's The Forgotten, which I didn't like at all.
from the back of the book:
The world is at war. Two men -one white, one black- find themselves in extraordinary circumstances, confined with the enemy, struggling to preserve a shred of dignity against impossible odds. They thought survival was their only purpose -until they realized that living means nothing without the truth. And when murder explodes the precarious order of their lives, they become unlikely allies in a monstrous fight for honor and justice. With these complex, vivid characters, John Katzenbach has written a thrilling, edge-of-your-seat novel, the most acclaimed of his career....
The Bruce Willis film by the same name was based on this book (though somewhat loosely, as I recall).
Kirkus Reviews claims this may be the author's best.