Confusion of princes (Nix, Garth)(2012, paperback)

Taken from his parents as a child and equipped with biological and technological improvements, Khemri is now an enhanced human being, trained and prepared for the glory of becoming a Prince of the Empire. Should he die, and be deemed worthy, he will be reborn…..Which is just as well, because no sooner has Prince Khemri graduated to full Princehood than he learns the terrible truth behind the Empire: there are ten million princes, and all of them want each other dead.