Son

Amazon writes this plot description, "They called her Water Claire. When she washed up on their shore, no one knew that she came from a society where emotions and colors didn’t exist. That she had become a Vessel at age thirteen. That she had carried a Product at age fourteen. That it had been stolen from her body. Claire had a son. But what became of him she never knew. What was his name? Was he even alive?　 She was supposed to forget him, but that was impossible. Now Claire will stop at nothing to find her child, even if it means making an unimaginable sacrifice. Son thrusts readers once again into the chilling world of the Newbery Medal winning book, The Giver,　as well as Gathering Blue　and　Messenger　where a new hero emerges. In this thrilling series finale, the startling and long-awaited conclusion to Lois Lowry’s epic tale culminates in a final clash between good and evil."

Not as good as the first two (The Giver and Gathering Blue), but I thought it was better than Messenger. I would say you have to read other 3 first. All in all, READ IT - it's only $9.00 for kindle.