In that memoir Thatcher wrote that Harris was "My indispensable sherpa in the enterprise of writing this book" and that "Without his advice and help at every stage, I doubt that we could have reached the summit".

Harris courted controversy when he wrote a pamphlet (A Tale of Two Chileans) in 1999 defending General Pinochet's coup d'état against the Marxist President of Chile Salvador Allende.

[5] Andrew Roberts, in a 2007 review, characterised as a "fluent, intelligent and engaging book" Harris' biography of Talleyrand.

[7] In August 2013, he wrote in defence of the Syriac Christian community, condemning the West's leadership over the "persecution leading to elimination" of that group.

[9] Harris wrote in February 2006 an article in the American Spectator in which he vehemently attacked the ICTY Hague Tribunal and its indictment against Ante Gotovina.

[4] Harris has praised Cardinal Alojzije Stepinac, the Archbishop of Zagreb during the Second World War, who he considers a victim of a communist kangaroo court.