Weighing just over 7 pounds, “London: Portrait of a City” lands with a thud, but, oh, what treasure lies within. Reuel Golden, formerly editor of the British Journal of Photography, has selected hundreds of photographs, many of them previously unpublished, to tell the story of the metropolis and its people from the Victorian era to the present. The images capture the Swinging Sixties, royal weddings, architectural masterpieces, and so much more. “London” also offers exhaustive, annotated lists of books, films, and songs in which London plays a part.