1976 Pyramid #V4068 "Inheritors Of Earth" Gordon Eklund & Poul Anderson

From the back cover: "To Alec Richmond, Sylvia Mencken seemed a mere mortal, while he was a Superior, one of the Inner Circle who knew things without being told and had perceptual powers that appeared magical to those who didn't know. But being a Superior had its shortcomings. He's started life as an Orphan and was permanently sterile. And, at any moment, he might lapse into the terrible madness that was the curse of so many Superiors. Then there was the danger even Alec didn't know about - the third form of humanity waiting... just waiting... for a chance to strike!" 

These 192 pages are barely toned and show light water damage on the lower-right corner. In addition, the cover is mostly clean but shows considerable edge wear and light creases. Pages are intact and tight to the spine with no writing or markings on the pages that I can see.