The Running Town: Alastair as king

Thrust into the magical realm of Taidya, a land he only knows from books, Alastair discovers he is its long-lost prince. His destiny is bound to the Sapphire of Tiamat, a sentient artifact that chooses its ruler. Wracked with self-doubt from a painful past, Alastair must decide whether to reject the crown or embrace a power that terrifies him, a power that Taidya desperately needs to be awakened.