I recently found this when cleaning out the attic and started to re-read. First got it nearly a decade ago and I rearly re-read anything but did remember this as a very good book. Second time around and it's still a great read about a small unit of British soldiers cut-off in the Congo after going in to rescue some missionaries. It's long out of print but if you can find it I highly recomment it

http://www.amazon.co.uk/Heraklion-Blue-Mike-Lunnon-Wood/dp/0727857924/ref=sr_1_1?ie=UTF8&qid=1314278685&sr=8-1

He also has another book "Long Reach"...just as good