Steadfast (Elemental Masters #8), by Mercedes Lackey. Release date: 6/4
Magic Rises (Kate Daniels), by Illona Andrews. Release date: 7/30
Cast in Sorrow (Chronicles of Elantra), by Michelle Sagara. Release date: 8/27
Chimes at Midnight (October Daye), by Seanan McGuire. Release date: 9/3
Battle Magic (Circle of Magic), by Tamora Pierce. Release date: 9/24
Shadows (stand-alone), by Robin McKinley. Release date: 9/24
Royal Airs (sequel to Troubled Waters), by Sharon Shinn. Release date: 11/5
Trade Secret (sequel to Balance of Trade), by Sharon Lee & Steve Miller. Release date: 11/5

things I haven't pre-ordered but might:
Codex Born: (Magic Ex Libris: Book 2), by Jim Hines. Release date: 8/6
Despite having owned it for months, I haven't read Libriomancer yet. So I can't say whether I plan to go on with the series.

What am I missing? What's on your list?