They call them the “rat-catchers.†They’re the crew of the spaceship Daedalus, which an economically destitute Earth has dispatched on a mission to re-establish contact with its far-flung, long-lost colonies in space. Alex Alexander, the ship’s biologist, together with his staff, must help solve the mysteries of human and alien ecosystems that he encounters light-years from home. Dendra is a stable world, covered by a huge, unchanging forest—except that nothing living can really be free…