Wikipedia page about this book: https://en.wikipedia.org/wiki/Islands_of_Space

Release date is 2007-04-05

Produced by Bruce Thomas, Greg Weeks and the Online
Distributed Proofreading Team at http://www.pgdp.net

"Islands of Space" by Jr. John W. Campbell is a science fiction novel first published in book form in 1957. This sequel to "The Black Star Passes" follows four heroes—Arcot, Morey, Wade, and Fuller—on an extraordinary voyage through distant realms. Generally credited with introducing the concepts of hyperspace and warp drive to science fiction, the novel presents a catalog of technological marvels and mechanistic wonders. It represents the "hard" science fiction of its era, where the narrative itself could not exist without its scientific foundation. (This is an automatically generated summary.)

Original publication data not identified