Scott Westerfeld, Specials
Robin McKinley, Dragonhaven
Michael Chabon, The Yiddish Policemen's Union
Edward Teller, Memoirs
Istvan Deak, The Lawful Revolution: Louis Kossuth and the Hungarians, 1848-1849
Peter Hoeg, The Quiet Girl
Parke Godwin, Waiting for the Galactic Bus
Brandon Sanderson, Mistborn
And here's what I haven't bought but hope to read soon anyway, courtesy of friends or the public library:
Barbara Goldsmith, Other Powers: The Age of Suffrage, Spiritualism, and the Scandalous Victoria Woodhull
Melvyn Dubofsky and Foster Rhea Dulles, Labor in America: A History
Everett Webber, Escape to Utopia: The Communal Movement in America
Carl Ross, The Finn Factor (In American Labor, Culture, and Society)
James D. Horan, The Pinkertons: The Detective Dynasty That Made History
How about you? What have you bought or borrowed but not read yet?
ETA: timprov points out that some of these were gifts or other people's purchases. True enough, but they're still on my to-read piles.