I am lucky that I have read this book "The Rules of Management" by Richard Templar.
This book is a real code for managerial success for managers and executives.
With the expanded edition, the book tells you the 107 rules, which can get the best out of your team to achieve your company goals more effective and successful.
The book is short and easy writing. If you want to change your managerial skills, I recommend you to read this book.