I read Stefan Klein's The Secret Pulse of Time: Making Sense of Life's Scarcest Commodity. I can tell you the book was not a waste of time. It offered some interesting perspectives from a number of disciplines plus some useful ideas on how one should spend and manage their time.
To save time, I did skip through certain sections of the book that did not catch my interest.
To be honest, it can take some time to read through the 277 pages of Klein's opus.
The best book I read concerning time and how to maximize it was Flow: The Psychology of Optimal Experience by Mihaly Csikszentmihalyi. I have kept a copy of that book in my personal library and frequently read parts of it that I have highlighted.