The 2013 James Tiptree, Jr. Literary Award and Honor List were recently announced. The Tiptrees are an "annual literary prize for science fiction or fantasy that expands or explores our understanding of gender" and are probably my favorite book award.
While this year's winner, Rupetta by N.A. Sulway, currently has limited availability in the United States, check out the British publisher's website for options. We'll be on the lookout for a U.S. edition to get for the library.
Thankfully, this year's Honor List has items that are easier to get. It's particularly notable that there are several teen titles on the list.
Honor List titles include:
Big Mama Stories by Eleanor Arnason
Hild by Nicola Griffith
The Summer Prince by Alaya Dawn Johnson (teen)
Ancillary Justice by Ann Leckie
September Girls by Bennett Madison (teen)
All Our Pretty Songs by Sarah McCarry (teen)
The Golem and the Jinni by Helene Wecker
Sea Change by S.M. Wheeler
Check out these books if you want to want interesting stories to make you think about your assumptions about gender. The Tiptree website has more information about the award itself (which always includes both a specially commissioned piece of art AND chocolate), past winners, and Tiptree herself (Tiptree was one of the pen names used by Alice B. Sheldon).