I'm always looking for new urban fantasy/ paranormal fantasy-romance (is that even a genre?) and I'd heard of this series for a while but I kept reading around it. Now that I finally picked it up, and I bash myself for not reading it earlier. 
 Catherine "Cat" is a vampire slayer. Commonly known as a dhampire in other books, she is half-human, half-vampire and all kicka**. After being informed on her 16th birthday what she was and how her father had raped her mother, she took it upon herself to kill vampires in the hopes of one day finding and killing her father. Although she is only 22, she has a highly impressive body count, using methods and skills she's learned on her own. 
 Then along comes Bones, an English vampire she attempts to kill but fails to. While being interrogated by Bones, they come to realize that they both have the same goal of killing the "bad" vampires. Seeing the benefit of Cat's strength and experience killing vamps while seeming like any other weak human, he "blackmails" her into combing forces. 
 It was quite a ride, as Bones "transformed" Cat into a sexy seductress that prowls bars and draws out the vampires. Especially since she is actually so shy and inexperienced in such matters. With his help, she is able to pull it off and learns how to use her "vampiric abilities" to her best advantage. Excited to see how she continues on without Bones after the ending where she fakes his death and escapes while leaving him a note to make it seem like she's done with him and the guilt of killing so many vamps.