Imago
The third and last book of Octavia E. Butler's Xenogenesis trilogy.
Plot
In Imago our protagonist is Jodahs, another Lilith Yiapo’s child, a mistake in person. Due to a problem in the breeding process, Nikanj “build” the first ooloi construct child. The consensus are broken, there should be no ooloi construct child, not yet. The Oankalis thought it would be very dangerous, and unpredictable. So, they decided to get it back to the mother ship. But for insistence of it’s family, it can stay on Earth but it and it’s family had to live in isolation, away from the baby ship (that serves as oankali’s cities) and other persons.
The book tell us about Jodahs’ problems to control itself: it can altered the genetic configuration of things only by touching them, and it changes itself as well, without any control of it, or sometimes without any aware of it. After a while it meets humans and with the connection with them it can control itself, it gets more focus.
The big problem with Jodahs is that it needs young humans to mate, and all humans in Earth are too old to it (that’s because an ooloi’s life time is regulated by it’s mates, so if Jodahs find it an old mate its life time would be reduced in decades). But one day, wandering in the forest he found a strange couple with some kind of deforming disease. Healing them he finds out that they’re a fertile and young couple, who came from a little society of people who developed the ability to breed without the oankalis and believes the oankali to be daemons.
By the same time, it's sibling, Aaron, is entering his own metamorphosis and we find out that it too is an ooloi construct.