Deadtown

"They call it Deadtown: the city's quarantined section for its inhuman and undead residents. Most humans stay far from its borders-- but Victory Vaughn, Boston's only professional demon slayer, isn't exactly human. Vicky's demanding job keeping the city safe from all manner of monsters is one reason her relationship with workaholic lawyer (and werewolf) Alexander Kane is in constant limbo. Throw in a foolhardy zombie apprentice, a mysterious demon-plagued client, and a suspicious research facility that's taken an unwelcome interest in her family, and Vicky's love life has as much of a pulse as Deadtown's citizens. But now Vicky's got bigger things to worry about. The Hellion who murdered her father ten years ago has somehow broken through Boston's magical protections. The Hellion is a ruthless force of destruction with a personal grudge against Vicky, and she's the only one who can stop the demon before it destroys the city and everyone in it" -- from author's web site.