Years ago, back in the early 1970s, during the UFO-craze, when "Chariots of the Gods" was a bestseller, I read a book titled ”Mankind - Child of the Stars”. The premise of that book was that modern human characteristics (physical, emotional, sexual, etc.) are so different from the rest of the great apes because humans did not evolve directly from a common lineage. Rather, said that book, humans were tinkered with, tampered, our genetics altered by an alien race that visited our planet thousands of years ago.
Mr. Vendramini’s book revives that premise, only this time, the “tinkerer” is the interaction between Neanderthals and the nascent human species. He calls these proposed dynamics "Neanderthal Predation (NP) theory".
Mr. Vendramini certainly does raise some interesting and provocative questions with his NP theory. The common conception of Neanderthals as fair skinned, red-headed cousins of humans is a well-established concept. Recent analysis of Neanderthal DNA does suggest that Neanderthals had red hair (unlike Vendramini's dark-haired monsters). However, our knowledge of how genes are actually expressed in a living organism is still incomplete. Vendramini’s hypothesis of Neanderthals looking more like the other great apes (chimps, gorillas, orangutans) does have some merit. Modern orangutans do have bodies covered with reddish hair.
Mr. Vendramini's book is certainly entertaining and thought provoking (your thoughts may vary). Whether his NP theory is truly a proper scientific theory is debatable. In any case, the material was fodder for my novella, and for that, I thank him.