A while ago I read a series of 3 books, which were about a human girl, whose name I don't remember, but was abbreviated to Shana.
She was raised by dragons, which fled their world because it was too dangerous. Most of the humans were kept as slaves by the elves, who feared their proficiency with magic. I also remember a group of free men, who found out that iron can block elven magic.
The series had two authors, and I remember the series would end at the 4th book but sadly one of its authors had passed away.