Death's Daughter by Amber Benson

SHE WAS TARA ON BUFFY THE VAMPIRE SLAYER.

Now she’s the author of Ace’s hottest new series— killer novels featuring Calliope Reaper-Jones, who doesn’t want to be daddy’s little girl anymore...

Calliope Reaper-Jones so just wanted a normal life: buying designer shoes on sale, dating guys from Craig’s List, web-surfing for organic dim-sum for her boss...

But when her father—who happens to be Death himself—is kidnapped, and the Devil’s Protege embarks on a hostile takeover of the family business, Death, Inc., Callie returns home to assume the CEO mantle— only to discover she must complete three nearly impossible tasks in the realm of the afterlife first.