The Key of Alanar by Rory B. Mackay

On his seventeenth birthday, David is given a crystal amulet, but it’s a gift that comes with a price. Targeted by a brutal military force, his home is attacked and destroyed and he finds himself on the run and embroiled in a dangerous quest. A dark force that first penetrated his realm in ancient times has returned. In possession of a remarkable latent power, David discovers that he alone can safeguard his world from a full-scale invasion. However, the enemy isn’t just pursuing him–it’s now within him.

Battling both hostile terrain and his own demons, an impossible choice lies ahead for David, the echoes of which will ripple throughout time, leading him to the very limits of the human experience, and beyond…

Spanning ten millennia, this epic yet intimate tale of loss, courage and redemption pushes the boundaries of storytelling, exploring the nature of life, death, the universe and reality.