Immortal Rain, Vol. 1 (Immortal Rain #1)

For centuries, the eternal Rain Jewlitt, known as Methuselah, has eluded assassins and bounty hunters out to uncover his timeless secret. One of his pursuers, the Grim Reaper Zol, never succeeded in killing Rain. In the wake of Zol's death, his young granddaughter Machika vows to avenge her grandfather's death and put an end to Rain's immortality...but she soon realizes that the thin line between love and hate just might last forever ...