Blood Curse: Waves of Darkness Book 1 - Waves of Darkness: the Sisters of Power, #1

Known as Bloody Vik Brandee, Viktor Brandewyne had a reputation as a bloodthirsty pirate. The world would soon learn just how bloodthirsty he had become. Thanks to the vengeful curse of a powerful witch, he had become a vampire. However, since he was cursed, rather than bitten, he was not vulnerable to daylight or holy items. As curses went, he didn't think it was all that bad, until Mother Celie, his foster mother and a witch in her own right, informed him that the curse would eventually destroy him.
Now he finds himself in a race against time to find the seven Sisters of Power and gain some of their magic in order to survive the curse. He is aided in his quest by Hezekiah Grimm, his first mate; Belladonna, a siren and sea witch; and Lazarus, a creature that is sometimes a cat and sometimes a raven.