Ed Ruscha’s legendary artist book ‘Twentysix Gasoline Stations’ (1963) zeroed in on banal subject matter to question its importance in American culture. In his latest solo show at Gagosian Gallery’s 24th Street location, Ruscha continues to pursue both books and paintings in works like Gilded, Marbled and Foiled, a painting that considers this book as a physical object more than a means of communication. (Through Jan 12th.)