A collection of related stories that happened to run in 5 consecutive issues of Wonder Stories March through August, 1933 - or a five part serialization of a novel. The 1975 Ballantine paperback was the first book appearance for these.

Book One: The Forest People - (original title= "The Man Who Awoke")
Book Two: Master of the Brain
Book Three: The City of Sleep
Book Four: The Individualists
Book Five: The Elixir