Cold Turkey — Nancy A. Collins

Vampire hunter Sonja Blue has battled everything from the undead to ogres. But her greatest enemy is The Other, the demonic entity that dwells within the darkest recesses of her mind and battles for control of their shared body. For years there has been an uneasy truce between the two--until The Other pushes Sonja over the edge by endangering the man who loves her. Sonja takes revenge, enlisting the aid of the demon Malfeis to contain The Other once and for all. But can Sonja Blue starve out The Other without destroying herself as well?
Contains bonus Part One Absalom's Wake-Gone A' Whaling!