New York 1900
Metropolitan Architecture and Urbanism 1890-1915
Robert A.M. Stern, Gregory Gilmartin, John Massengale
This is an excellent treatment of New York architecture, 1890-1915, divided into chapters by building type. It's substantially thinner than Robert Stern's other books in this series (New York 1880, New York 1930, New York 1960), but there's enough meat here that the reader feels the topic has been fully covered. The book has a particularly attractive page format, with numerous photos that beautifully document the era (averaging approximately one per page). There are also roughly 60 floor plans, although most page space is used for text.