An hour, near enough to the minute. That is the shape Marcus Thorne has chosen for Focus First in Your Life, and for a book about attention the choice reads as part of the argument rather than an accident of production.
Our catalogue files it across business and careers and personal development, which is where the modern literature of concentration tends to sit. The subject belongs to the office and to the rest of life at the same time, and the better books in this line refuse to separate them.
The record holds nothing else, and we prefer to leave it that way.