From longtime Vanity Fair contributing editor David Margolick comes the first definitive biography of Sid Caesar: founding father of American comedy and the icon who made modern television.

In the spring of 1954, Sid Caesar was America’s number one mensch. Each Saturday night, the 31-year-old sketch comic from Yonkers performed for a crowd of twenty million—some crammed into Manhattan’s cavernous Center Theater, but most plopped on their couches, where Caesar beamed back at them through some of the first TVs to light up living rooms.

For many Americans, Caesar was television. And Your Show of Shows, the 90-minute variety program that catapulted him to stardom, was his magnum opus. Onstage, Caesar could be anyone: a befuddled suburban husband, a pretentious expert fibbing through an interview, a gumball machine, a bottle of seltzer. And he could make anything funny. But behind the entertainer was the man: introverted and tongue-tied, an actor whose hardest role was to simply be himself. Few could have known that, within just a few years, Caesar would be off the air. Television’s first true star was also its first fall from grace. But in his wake would come the talents he personally nurtured―including Mel Brooks, Carl Reiner, and Neil Simon―and the generations of comedians he inspired.

In When Caesar Was King, veteran journalist David Margolick conjures Caesar like few writers can. Deeply researched and brimming with love for its subject, this rollicking and affecting book charts the meteoric rise and fall of a true legend, and his lasting impact on what makes us all laugh.