Code Name Verity by Elizabeth Wein
After their British spy plane crashes in Nazi-occupied France, two young women must fight to survive. An extraordinary novel of survival, independence, and the bonds of friendship.
Ender's Game by Orson Scott Card
In a future racked by war with an alien species, on child may be our only hope. But at what cost? Ender's Game is one of the finest science fiction novels ever written, but you don't have to be a fan of science-fiction to enjoy it. If you like imaginative stories about humanity and hard choices with great characters, Ender's Game is for you.
The Fault in Our Stars by John Green
Considered to be one of the best novels of 2012, Green's novel follows Hazel Grace, a teenage girl coping with cancer, as she falls in love for the first time while facing her own mortality and the questions that come with it.