He has written for The Nation, The New Republic, the Intercept, Rolling Stone, the Guardian, Foreign Policy, the Baffler, the International Herald Tribune, Wired, the San Francisco Chronicle, and The Believer, among others.

His first book, Common Nonsense: Glenn Beck and the Triumph of Ignorance, was published by John Wiley & Sons in June 2010.

[5] Zaitchik's fourth book, "Owning The Sun: A People's History of Monopoly Medicine from Aspirin to COVID-19" was published by Counterpoint Press in March 2021.

Kirkus Reviews called Owning the Sun “A brave and timely reminder… A trenchant study of the dangers of turning medical knowledge into private intellectual property.” [6] Publishers Weekly said Zaitchik " takes readers through the labyrinthine history of medical patents in this expansive study… Zaitchik covers a remarkable amount of ground and never gets lost in the weeds.

The result is comprehensive and illuminating.”[7] Representative Lloyd Doggett praised Zaitchik, writing "With so many Americans unable to afford ever soaring drug prices, Zaitchik’s important [and] insightful history of the rise of Big Pharma demonstrates the urgency of restraining pharmaceutical monopoly power.”[8]