A six-man crew crash-lands on Eden, fourth planet from another sun. The men find a strange world that grows ever stranger: a desert plain exuding acrid vapors, a greenish tinge at the horizon, a gray seven-foot tree that hisses and withdraws into the ground when touched, and thickets of vegetation like hanging spiders. In a labyrinth of plant-shaped buildings are dead ends, passage-ways, domes, vaulted ceilings, and giant statues. And everywhere...