After hours of searching and scouring my memories, I finally found what I was looking for. The Book is Keeper Of the Lost Cities by Shannon Messenger. Remembering that it was elves and not fairies was the main breakthrough, because I kept getting directed to the Fablehaven series, which was not it. Thank you DavidW for helping me out, and I hope this helps anyone else who doesn't remember this series.

After hours of searching and scouring my memories, I finally found what I was looking for. The Book is Keeper Of the Lost Cities by Shannon Messenger. Remembering that it was elves and not fairies was the main breakthrough, because I kept getting directed to the Fablehaven series, which was not it. Thank you DavidW for helping me out, and I hope this helps anyone else who doesn't remember this series.

The protagonist of the series, Sophie, is a twelve-year-old elf with telepathy who lives in San Diego, California with a human family.

While on a school field trip, another elf teenager, Fitz tracks her down and reveals that she is a elf. He discusses the reality of their world with Sophie and tells her that she must move to the Lost Cities, a place unknown to humankind where elves, trolls, ogres, goblins, gnomes and dwarves live in harmony. She is forced to leave her human family behind and stay with an elvin couple, Grady and Edaline, who later adopt her. She starts school at a noble elvin academy named Foxfire.