Dracul by Dacre Stoker and J.D. Barker

 A prequel of sorts to Bram Stoker's Dracula, Dracul traces the origins of the classic tale. Written by Bram's great-grandnephew Dacre Stoker and his writing partner J.D. Barker, it's a chilling return to classic vampire literature. 

"A riveting novel of Gothic suspense, Dracul reveals not only Dracula's true origin but Bram Stoker's - and the tale of the enigmatic woman who connects them."