Find out more about each title on GoodReads by clicking on each book cover or title. Keep in mind that publication dates can change, but as of now, these are all slated for release sometime in 2013 (as per GoodReads.) There's nothing I like better than spreading the word about books, so here goes nothing...
Lots of great YA:
A couple of adult books:
A few that don't have covers yet (Adult):
Written in My Own Heart's Blood, by Diana Gabaldon -- the next Outlander book, eeee!
The All Souls Trilogy book #3 (untitled), by Deborah Harkness
The City of Mirrors (The Passage #3), by Justin Cronin
A few that don't have covers yet (YA):
All That Was Lost Where the Stars Still Shine, by Trish Doller
Fullriders #1 (untitled), by Simone Elkeles
The Retribution of Mara Dyer, by Michelle Hodkin
Horizon (Soul Seekers #4), by Alyson Noel