Glimmerglass

Dana Hathaway lives with her drunkard mother in the United States, but when she shows up at her voice recital drunk...again, Dana decides she has had enough and goes to Avalon--the only place where humans and faerie intersect--to visit her father. Despite the stories Dana's mother has told her about her father being evil, she goes. Only to figure out that she's of a rare kind: a faeriewalker--the last one in fact.

Being a faeriewalker means that Dana can travel between Faerie and the mortal world. Also, she can bring technology into Faerie and magic into the mortal world. Having these abilities means that Dana is a sought-after girl. So sought-after, in fact, people want her killed.

Caught in between a terrible game of Fae politic, Dana must juggle creating a relationship with her new-found father, her friend ships with her crush, Ethan, and his sister, Kimber, also Dana's best friend. Caught between two worlds, Dana wonders if her world will ever go back to normal.

Author: Jenna Black

I would probably recommend this book 13+, due to slight language in the beginning, kind of progressing toward the end. Overall though, it was a very intriguing book, pulling me in and not letting me out.(:
There are two other books in the series: Shadowspell, and Sirensong. They're both good, but the second one is probably 14+.

Have a great time, guyssss!