Art-book flea market in the sculpture court! Seattle's contemporary museum, the Henry Art Gallery, has decided to whittle its stash, meaning art books on the cheap. There'll be exhibition catalogs; artist biographies; nerdy periodicals (yesss!); delicious, delicious theory and history books—and you're encouraged to bring your own art books to trade. In James Turrell's Skyspace, in honor of words day at the museum, experimental poets Nico Vassilakis, Crystal Curry, Joel Felix, and Jeanne Heuving will give sky-spatial readings (sunny!) at noon and 2:00 p.m. (Henry Art Gallery, 15th Ave NE and NE 41st St, 543-2280. 11 am4 pm, free.)