Nix, Garth. A Confusion of Princes.
A treat for Sci-Fi fans. No dragons! or vampires!
Khemri was taken from his parents as a baby, trained to be a leader, and enhanced with super-capabilities. He is now one of a million princes in line to replace the Emperor. His biggest obstacle is staying alive. As part of his trials to prove himself worthy as an emperor, Khemri is stripped of his enhancements and sent to live in several different environments where he must learn to adapt quickly or die. His mysterious Master of Assassins councils him in more ways than just avoiding death and helps him to mature from a selfish teen to a young man who must choose how he wants to live his life. Raine lives on a far planet and it is through her and her family that Khemri learns what the empire means to the average citizen. There is no on-screen sex but references to courtesans might make this for older teens in some communities. Highly recommended.