"There would be precious few people around the world who would say that Richie McCaw did not distinguish himself on the field as well as off. As captain, he led a team that performed at the highest level with a winning record verging on 90 per cent. As a leader, he inspired all those around him, and all those that followed him."
In his book, Clarke claimed Buchanan was not qualified to know anything about the baggy green as he never represented Australia, and added: "He's still living off the fact that he coached a team that anyone, even my dog Jerry, could have coached to world domination."
Buchanan, who played first class cricket for Queensland, responded by saying he was still able to appreciate the significance of the baggy green cap, and pointed to the special ceremonies he introduced which saw test debutants presented with their caps by former Australian cricketing greats.
"The role of the coach in this environment is such that the person is a leader, a manager, a mentor, a parent, a friend, at all different times, in different circumstances, and for different people - the art is to know when to adopt the correct role, and how to deliver it," Buchanan wrote.