Immortal. The Valiant Series

Immortality is his curse. As a slave, Nasan wants to avoid notice and survive. When Eshe begins showing him kindness, though, Nasan starts to see life as worth living. His hopes shatter when Tarik-Eshe's pursuer and Nasan's enemy-becomes trapped in a curse of immortality with Nasan. Their lives woven together with ancient magic, Tarik and Nasan struggle against each other throughout all history. Nasan desires to hold Eshe's love; Tarik continues to steal their hope of ever truly living, and every torturous era Nasan endures pushes him closer to the brink of giving up everything. When an archeologist discovers Nasan's journal, she races to uncover his secrets and find him before he disappears from history and time-forever.