Three great science fiction books for one low price! When a genetic experiment goes wrong, grass threatens to take over the Earth. In Ward Moore's acknowledged masterpiece, as individual people struggle to survive, scientists struggle to stop the disaster only to realize it is easier to wreck an ecology than to fix it. When a starman leaves his returning ship to search for the twin brother who stayed behind, as hugo winner Robert Silverberg tells the story in this, his first published sf novel, the starman discovers some of the dark secrets that underpin his society, and is soon on the run and the subject of his own manhunt. Then the mordant, satirical eye of Robert Bloch, author of Psycho, look ahead to an era when overpopulation threatens to put an end to This Crowded Earth.