Anonymous wrote:Sisterhood of the Traveling Pants, The Fault in Our Stars (and other John Green books), The Princess Diaries series.
But at this age kids should be venturing beyond YA and reading widely. Hemingway, Austen, Tolstoy are all pretty accessible and enjoyable. If she's a less advanced reader, Little Women and Anne of Green Gables are also great.
Agree with this (though I could only bring myself to read the "peace" parts of War and Peace at age 12, the war parts were incredibly boring).
Non-YA
Lovely War (yes it's historical and has Greek gods in WWII France, but it's not hitting you over the head with the history and you don't really have to know the mythology to get into it)
Try Agatha Christie if she might be into mysteries.
YA
Gary Schmid books like The Wednesday Wars, Okay for Now, and Just Like That
Meet the Austins series
The Mother-Daughter Book Club
The Westing Game
The Inheritance Games series