I admit it--I picked it up and read it because I liked the cover. It looked like it could be an Edgar Rice Burroughs-type of adventure story. I certainly did not know who Frank Belknap Long was. It turns out that Long (1901-1994), a life-long New Yorker, wrote for the pulp magazines from the 20s right into the 60s. This very short novel was published in 1971 and it might have worked better as a shorter story in pulps of the 40s or 50s. Although short (157 pages), it seemed to drag and rely too much on dialog. The story is not without interest as it involves time travel. As the cover shows, there are savages threatening a modern man. Our heroes go into the future to find humanity has fallen back into savagery. Using a powerful weapon, they slaughter the savages. But our heroes hope to use their time machine to pick up people from the past to establish a colony in the future--and make a brave new world. The story could be much better. Hmmmm...let's see, what I would change....