Kate Wilhelm has a reputation as one of the 20th century's finest SF writers. Winner of the Hugo Award for Where Late the Sweet Birds Sang, she has produced an impressive body of work in the fields of SF and crime, and - along with her late husband, Damon Knight - has had a profound influence beyond her writing, through the Milford and Clarion Science Fiction Writers' Workshops. This omnibus contains novels The Clewiston Test and Welcome, Chaos and story collection The Infinity Box.