This lot includes two science fiction books, "World Omnibus of Science Fiction" and "Birthright: The Book of Man" by Mike Resnick. Both books were published in 1982 & 1987 by Penguin Publishing Group and are in mass market paperback format. The stories cover topics within the genres of fantasy and science fiction, making them a perfect addition to any fan's collection. "Birthright" is a 1980's paperback with dimensions of 5 inches in length, 7 inches in width, and 1 inch in height, weighing 8 ounces.