Libba Brey wrote the Gemma Doyle series. I read these books in 7th grade and really enjoyed them. I would recommend them for 9th grade through 12th grade! They involve a ton of magic, fantasy, and danger. Set in the 19 century.
Jennifer Donnelly wrote the book Revolution (about the French Revolution) and A Northern Light (about a murder in a small town, set in the 1930's). I read Revolution 3 times and did a book report on it. It is my favorite book I have ever read. :)
Rachel Hawkins wrote the Hex Hall series. I read these in 7th and 8th grade and loved them. They involve fantasy, romance, magic, and danger!
Maggie Stiefvater wrote the Wolves or Mercy Hall series. They have hot wolves in them, what more could a girl want.
Happy Reading :) Enjoy!