American themes captured in Swann May 27 Photography saleNEW YORK — Exploring the thematic and visual diversity of the photographic medium, Swann Galleries’s auction of Photographs & Photobooks on May 27 covers 20th-century masters, as well as contemporary practitioners and items from the visual vernacular: albums, archives, and individual objects. Absentee and Internet live bidding will be available through LiveAuctioneers.