Perhaps prequel to [b:Tomorrow's Kin|31702736|Tomorrow's Kin (Yesterday's Kin Trilogy, #1)|Nancy Kress|https://images.gr-assets.com/books/1482256477s/31702736.jpg|52384449] but also included in [b:Tomorrow's Kin|31702736|Tomorrow's Kin (Yesterday's Kin Trilogy, #1)|Nancy Kress|https://images.gr-assets.com/books/1482256477s/31702736.jpg|52384449] as part one. The content is the same so if you want all three parts read [b:Tomorrow's Kin|31702736|Tomorrow's Kin (Yesterday's Kin Trilogy, #1)|Nancy Kress|https://images.gr-assets.com/books/1482256477s/31702736.jpg|52384449].