The Boy who Lit up the Sky by J. Naomi Ay

After a thousand years of war, the Mishnese and Karupta have made peace by wedding the Mishnese Princess Royal to the Karupta Crown Prince. Their son whose birth was foretold ten centuries ago is destined to rule the entire planet and end the wars forever. But the Princess and the baby have died during childbirth or so it was said. In the meantime, a strange half-breed infant boy is left at an orphanage with a purse full of gold coins.

Thus begins the tale of Senya, a prince created to be king of a planet but tossed aside until his twelfth birthday when a Royal Guard detective is sent to retrieve him.  It is unclear to all whether Senya is the product of something good or something evil, but in either case, it is very apparent that he is something more than just a lost boy.