"Brutally Practical Approach to Changing Yourself"
Of all the books I have read which address techniques to make me a better person and more effective colleague, this may be close to the best. Marshall applies a brutally practical perspective that anyone who wants to change can benefit from.
"Relevant to most humans"
While this book assumes familiarity with David Allen's productivity principles which may limit the audience, the themes inside are relevant to most people. Who doesn't want to get more done with the limited time we are given on this planet?