In 1916, Philadelphia department-store magnate John Wanamaker launched plans for a Sesqui-Centennial International Exposition in 1926. It would be a magnificent world's fair to celebrate the 150th anniversary of the Declaration of Independence. The "Sesqui" would also transform sooty, industrial Philadelphia into a beautiful Beaux Arts city.

However, when the Sesqui opened on May 31, 1926, in the remote, muddy swamps of South Philadelphia, the fair was unfinished, with a few shabbily built and mostly empty structures. Crowds stayed away in droves: fewer than five million paying customers attended, costing the city millions of dollars. Philadelphia became a national scandal—a city so corrupt that one political boss could kidnap an entire world's fair.

In his fascinating history Sesqui!, noted historian Thomas Keels situates this ill-fated celebration—a personal boondoggle by the all-powerful Congressman William S. Vare—against the transformations taking place in America during the 1920s. Keels provides a comprehensive account of the Sesqui as a meeting ground for cultural changes sweeping the country: women's and African-American rights, anti-Semitism, eugenics, Prohibition, and technological advances.