Executive Intelligence by Justin Menkes was a book that came highly recommended by Andrew Frame (CEO of Ooma).
I’m a huge fan of Andrew’s so I took his recommendation seriously and read it right away. the book is a fast read so it is a good information to time ratio (which is how i judge most books). it has one key concept: hire critical thinkers to your organization. it is pretty simple but powerful and important and Menkes makes a good case while interviewing many successful CEOs.
overall: the book is good and you can probably read the entire thing in 2 hours — so you might want to just borrow it from a friend (i left my copy on an airplane or i’d lend you mine).