Publisher: Penguin Science Fiction, No. 1875, 1963, 327 pgs. A very good ++ Trade Paperback with light edgewear and scuffing. Well bound with an unmarked interior. "First published nearly 70 years ago, this text is regarded as one of the most influential science fiction novels of the 20th century. Olaf Stapledon creates a history of the evolution of humankind over the next two billion years."