Crucible

The Pathfinder Ship Pegasus comes to the rescue of its sibling ship, Lexington Keeler. They find the other ship spiraling in toward the surface of a burning planet. The odds against a rescue are almost impossible, but the crew attempts it anyway. And so begins a story of heroism, betrayal, alien attacks, mystery, mutiny, and courage. And if those don't do it for you, there is also a smart-ass robot, a cyborg zombie, a trained nymphomaniac and a hive of telepathic rats. Crucible is the sixth book in the twelve-book Worlds Apart saga, and by the time it closes, the crew of Pegasus will never be the same. It will be a lot smaller, for one thing.