Black Dog Rising by Kat Caulberg

Since arriving in England, nothing has made sense for Emma Aubrey. Forced to flee her ex-boyfriend and the vengeful ghost of his dead wife, she seeks refuge in Ninestone Downs, a sleepy country village where people still whisper of fairies and a hellish phantom canine prowls its streets.
Toby Deering has no more room in his life for the paranormal. He’s got secrets of his own, including a four-hundred-year-old curse and a past he can’t escape. The last thing he wants is a quirky American woman on his doorstep in desperate need of shelter, or the accidental touch that awakens a bond between them neither can ignore.

But ancient forces are stirring. When Emma finds herself the target of a shadowy stalker, will her bond with Toby be enough to withstand the evil Fae Court and the hellhound on her heels?