Last year Brazos Bookstore, the most civilized shop in town, gave birth to a nonprofit arm, Brazos Projects, which sponsors the kind of artistic and literary events that make thinking people swoon. So far it has brought to town Robert Pinsky, the U.S. poet laureate, and has shown furniture (furniture?!) by sculptor Donald Judd and architect Frank Gehry. This fall Brazos Projects offers "Cy Twombly Photographs," which includes pictures the painter snapped of culture-hero pals such as Robert Rauschenberg, John Cage and Franz Kline. The show was curated by more names worth dropping: by Twombly himself, and by Paul Winkler, of the Menil Collection. Yes, the Menil's "Cy Twombly: The Sculpture" show will be bigger and more important than this little companion piece, but these rarely exhibited photos show another, more intimate side of the artist, a side that Houston will be lucky to see.