The biography of Vivekananda won him the Vishwamanava literary award of the De.

His biography of Kennan won the Pulitzer Prize for Biography in 2012.

The biography won, among other awards, the International Business Book Award from the Financial Times.

David Darlington's biography of him in Wine & Spirits magazine won the James Beard award.

That biography too had won the Pulitzer.

His intellectual biography of Yehuda Halevi won a 2010 National Jewish Book Award.

His 1931 biography of Hume won the James Tait Black Award and he also edited Hume's letters.

This biography also won the Evans Award for the best biography in Western history.

Professor Franklin's biography of Mr. Williams won the 1985 Holt Literary Award.

The biographies of Premchand and Vidyasagar also won the him Ilakkia Chintanai Prize.