Lawrence Cunningham is the author of 20 books; an academic with over 60 publications; a legal expert; an accounting expert; a governance expert; a director on 3 quoted company boards; and a company adviser.

His most famous book is the Essays of Warren Buffett in which he extracts sections from the sage’s letters over decades and orders them by subject. In our conversation, he tells how he first met Mr Buffett, how the books came about, how he sends Mr Buffett a draft of each publication, and explains how and why the letters are so carefully crafted.

Few have studied Berkshire and particularly the letters as closely and he has some fascinating perspectives.