Instruct: Classify a review into positive or negative sentiment.
Query: A great trilogy!

This series starts with a woman (Lilith) again being allowed to awaken to the reality of the world having been destroyed by nuclar war and its aftermath. She learns the people who have captured her are in reality rescuers - and alien. They are traders of a kind - gene traders. And the price for salvaging what little remains of humanity? Becoming a part of their family, and helping to create the new version, the Onkali/Human hybrid (construct).The second book deals with one of Liliths children, Akin. the first male construct born of the human female part of one of their families. He becomes involved with the resisters, humans who have not become part of an Onkali family.The third book is about another child of Lilith, Jodahs. His metamorphasis (when a subadult changes and becomes male or female) is a surprise to all - he is becoming ooloi, the third sex!This was one of those series that I just wish had gone on and on!