lgbt

Here are some titles that have worked for book discussion and/or readers advisory in a public library setting. But make sure they work for your audience! Good luck! It's awesome that you have an opportunity to work on this list.

fiction

De Oliveira, Eddie - Lucky
Hartinger, Brent - Geography Club; Order of the Poison Oak (sequel)
Koja, Kathe - Talk
Konigsberg, Bill - Out of the Pocket
LaRochelle, David - Absolutely, Positively Not
Levithan, David - Boy Meets Boy
Lieberman, Leanne - Gravity
Moore, Perry - Hero
Peters, Julie Anne - most of her YA titles, including Keeping You a Secret; Luna; grl2grl (a short story collection)
Sanchez, Alex - Rainbow Boys, Rainbow High, Rainbow Road (3-volume series); plus So Hard to Say.
Sloan, Brian - A Really Nice Prom Mess
St. James, James - Freak Show
Steinhofel, Andreas - The Center of the World
Winterson, Jeanette - Oranges Are Not the Only Fruit
Wittlinger, Ellen - Hard Love; Love & Lies: Marisol's Story (new sequel to Hard Love); Parrotfish
Wyeth, Sharon Dennis - Orphea Proud

nonfiction/memoir

The Lambda Literary Awards include a Children's and Young Adult category. Past award winners are here: //www.lambdaliterary.org/awards/previous_winners/paw_2004_2006.html.

The Human Rights Campaign has several annotated bibliographies listed here http://www.hrc.org/issues/parenting/schools/7839.htm

That should give you quite a bit, but if I think of more sites I will add them.