Get lost in the world of fantasy and science fiction with this paperback novel, "Ultimatum In 2050 A.D." by Jack Sharkey. Published in 1965 by Ace Books, this book takes you on a thrilling adventure through time and space. The author's vivid imagination and captivating writing style will keep you hooked from start to finish. Whether you're a fan of fantasy or science fiction, this book is perfect for you. The language used is English and the genres include both fantasy and science fiction. With its unique plot and incredible characters, "Ultimatum In 2050 A.D." is a must-read for all book lovers. Get your hands on this masterpiece today!