Riffs, revisions, knockoffs, and homages: artists pay tribute to Ed Ruscha's famous photo-conceptual small books. In the 1960s and 1970s, the artist Ed Ruscha created a series of small photo-conceptual artist's books, among them Twentysix Gas Stations, Various Small Fires, Every Building on the Sunset Strip, Thirtyfour Parking Lots, Real Estate Opportunities, and A Few Palm Trees. Featuring mundane subjects photographed prosaically, with idiosyncratically deadpan titles, thes