3.5 stars
A solidly-written story about survival and friendship, Two for Survival may not be great, but it is quick and easy to enjoy. I saw the twist coming a mile away, since the clues were a bit heavy-handed, but there is good tension in the suspenseful scenes. I liked that Mark and John, though there was some tension between them at first, didn't just start out as enemies. They weren't quite comfortable together at the start, but they came to trust and like each other in an organic, believable way.
Mark and John's relationship was the best aspect of the book, which can be repetitive in places. But it's a good story in general, and certainly doesn't deserve to be out of print.