Connected by Blood & Keys - Gifted Blood Universe, #1

Tyler Asoron has lived the simplest life a seventeen-year-old orphan can, raised by his aunt Rebecca and uncle Rion. He often wonders what life would have been like knowing his birth parents, but it's not a topic Rebecca revisits often. With high school graduation approaching, the time felt fitting to uncover the mystery. But Tyler is given more than he bargained for when the unexpected arrival of the Scotler family, former friends of his parents, comes to town.
Shadowed figures, elusive voices, and dead animals in the woods send Tyler's world spiraling. His best friend, Kyle, has scientific theories about almost every strange occurrence. Still, Tyler is certain he'll learn all he needs from the Scotler family, but not before Rebecca can warn him of the threat from the Cerif Coven, blighted immortals, and overthrowers of the royal Vasilikós kingdom, lineage Tyler belongs to. Suppose Tyler can wrap his head around being royalty and the existence of the supernatural.
Then, surely, he can still make it to graduation with Kyle. However, he must face another reality-his long-lost twin brother, Rennon. The power to restore the dormant bloodline and save a lost kingdom is in their veins-but Tyler can't shake his distrustful feelings. With truths kept from him at every turn, Tyler must decide where to put his trust or risk, never knowing what truly connects him by blood.