"Dayworld" by Philip Jose Farmer is a first edition science fiction novel published by Penguin Publishing Group in 1985. This vintage hardcover book, weighing 27.3 oz and containing 336 pages, is intended for adults and is written in English. The narrative follows the story of a man who enters a dream world where he experiences multiple lifetimes within a single day. With a dust jacket included, this novel offers a unique and immersive experience for readers interested in science fiction and philosophical themes.