The One is a young adult fictional novel by Kiera Cass and was published by HarperTeen on May 6, 2014. The book is the third and final in the trilogy.
The book marks the end of America's journey as an Elite as she is forced to prove her love for Prince Maxon whilst bearing the King's wrath. At the same time, the rebel troops are becoming more and more prominent in their quest to destroy the monarchy and force people under their rule. America has to put an end to the violence whilst also claiming Prince Maxon's heart once and for all.
The Selection trilogy has been present in the No. 1 position New York Times bestselling books. A movie has been optioned by Warner Bro's, with Yael Grobglas playing the role of America.