His second book, Singular Sensation: The Triumph of Broadway, was published by Avid Reader Press, a division of Simon & Schuster, on November 10, 2020.
Riedel's skewering of Broadway shows and personalities in his column have made him a controversial figure on the New York theater scene.
The summer after his sophomore year, he interned for Liz McCann while she was producing the Broadway production of Les liaisons dangereuses.
[3] After graduating from Columbia, Riedel served as managing editor of the now-defunct TheaterWeek magazine, which he attempted to make more literary by hiring highly theater figures such as critic Eric Bentley to write articles.
In 2005, Riedel was the subject of press himself when he was in an altercation with English director David Leveaux at the Manhattan theater hangout Angus McIndoe.
Riedel, who later admitted to being "tipsy," insulted Leveaux by claiming that English directors often ruin classic American musicals.
In view of his reputation as a theater columnist, Riedel was referred to as a "Napoleonic little Nazi" in the premiere episode on February 6, 2012.