The four stories collected in this book were written by two sons and a daughter-in-law of Tarzan creator, Edgar Rice Burroughs. John Coleman Burroughs and Jane Ralston Burroughs wrote "Hybrid of Horror." John Coleman and his brother Hulbert wrote "The Man Without a World," "The Lightning Men," and "The Bottom of the World." Fully illustrated with the original artwork from the pulp magazines Thrilling Mystery, Thrilling Wonder Stories, and Startling Stories.