A self-described classical liberal, he authored 16 books, including the bestseller Vengeance (1984), the story of an Israeli operation to kill the terrorists responsible for the 1972 Munich massacre.

[8] He worked as a columnist for the Toronto Sun from 1981 to 2001, when he moved to the National Post, where he remained a regular contributor until his death.

It was later developed as a feature film Munich (2005), directed by Steven Spielberg and with a screenplay written by Tony Kushner, an American playwright who won the Pulitzer Prize.

He felt that the film Munich suggests that there is little difference between terrorism and counter-terrorism, and thus Spielberg's movie had a spirit opposite to that of his book.

In the article, Jonas notes that the world and opinions about allowable actions and grievances has changed in the nearly 20 years between when his book was published and the film was being developed.

[10] Given the nature of intelligence and secret operations, Jonas acknowledged there was no sure way to determine whether his source was telling the truth, as governments do not like to confirm such material.

[12][13] In 2013, Jonas was made a Member of the Order of Canada "for his thought-provoking contributions to Canadian public discourse as an author and journalist".