I have an original 1967 hardcover edition of this book, with dustjacket, but recently discovered that it is still in print by the University of Toronto Press in softcover, as well as e-book format: https://utorontopress.com/us/paris-19... A must read for World's Fair aficionados!
Encompassing the social history, international diplomacy, architecture & the decorative arts of fin de siècle Paris & its Universal Exposition of 1900, all within a masterly composed, superbly & exhaustively researched slim little volume. Flawless.