In mid October, the New York Stock Exchange published a free book called "Navigating the Digital Age" subtitled, "The definitive cybersecurity guide for directors and officers."
It draws together a lot of wisdom from all over the computer security and business consulting industries. In particular, the second article in the book may be of greater interest, called "The three Ts of the cyber economy." By Michael Chertoff and Jim Pflaging. The three Ts being Technology, Threat and Trust.
The book is available here: https://www.securityroundtable.org/the-book/
I think that (probably) the most important aspect of this book is not so much it's content, which is very useful, but more that it exists and has been published by the NYSE. This means that ignorance of the issue is no longer an acceptable excuse for boards of directors and senior executives.
David Heath is a New Zealand-born Australian resident who initially pursued Geology and ended up with a Computer Science degree.