Changeling's Fall - Sarah Joy Adams

Her Faerie Tale is getting awfully grim. 

Deor Smithfield had it all figured out. She had a great education, a new job teaching at a good university, and a plan to move across the country to start her new life. 

Then her body betrayed her, and she seemed to be falling prey to the same wasting sickness that killed her mother. When medical science failed her in spectacular fashion, Deor's grandmother told her that her long-lost father was more than just another deadbeat dad - he was a faerie, and she's a Changeling, half-human, half-fae. 

Now Deor has to rush to Faerie in search of her missing father before his magical parting gift kills her. She's in a new world with no friends, no money, no job, and only a few days to find her disappearing daddy before she's kicked back out into the mundane world to die. 

Oh yeah, and somebody's hunting Changelings in Faerie.