Glimmerglass by Jenna Black is the first of the Faeriewalker series. It's set in Avalon, a mountain town outside of London that sits on the border between the human and fae dimensions.
Dana Hathaway has run away from the United States and her perpetually drunk mother to meet a father she's only just tracked down. She knows something is up as soon as she crosses into Avalon and is asked a second time for her passport.
Rather than finding her father, she's locked up by a woman claiming to be her aunt. Soon she learns that her father is a very important member of the Seelie court. Because of course he is. It's not like in one of these stories, you're going to be the daughter of a faerie janitor or something.
The biggest problem for this book is how much time is spent in gaol or under house arrest. Dana is constantly locked up and during her incarceration we are privy to info dump after info dump.
I wish Dana had been given more chances to explore Avalon. It had an interesting set up, being a spiral village. I picture it being like Castle Mount on Majipoor. But we only get a glimpse of the city near the end when Dana is doing her best to escape.