The World of Ptavvs1965

An easily read science fiction novel dealing with the notion of you are just the sum of your memories. Some nice twists such as Kzanol (the alien) realising which planet he's on and Mankind's colonisation of space resulting in the same old territorial disputes. From the cover: Larry Greenberg's telepathic tendencies had been trained and developed to a critical level. The trouble was that if these psychic interchanges were strong enough, a man could end up not knowing who he really was. And when Larry's mind is taken over by a sinister alien force, he has to fight to retain his sanity - and divert a disaster that threatens all Mankind... The brilliant first novel by the Hugo and Nebula award-winning Larry Niven, author or RINGWORLD, co-author of THE MOTE IN GOD'S EYE and LUCIFER'S HAMMER.