The mercurial, self-mythologizing novelist and journalist Joseph Roth, author of the 20th-century masterpiece The Radetzky March, was the finest observer and chronicler of his age. Endless Flight travels with Roth from his childhood in the town of Brody on the eastern edge of the Austro-Hungarian Empire to an unsettled life spent roaming Europe between the wars, including spells in Vienna, Paris and Berlin. His decline...