Know Your Core by Alex Laws is a quick read (141 pages) that will likely have lasting impact on your life (if you read it). Why? Because the book provides a reliable and quick reference to easy follow concepts that make [sic., so much] sense for your personal and professional life.
Yeah, you (and I) could have thought of and collected these lines of thinking and put them into our own personal notebook. However, we did not.
So for a few dollars Laws makes Know Your Core an easy (and constant) reference.
My companies have directly benefited from the (operational) council provided by Alex Laws. I was rather skeptical of using him at first. However, his references provided unqualified recommendation. I now understand as to why.