After researching after reading Principles book, I discovered there is a followup book called Principles for Success. This book is a good summary and overview of Principles book. Principles for Success book is short and illustrated version designed for all ages. So this book should be No.1 to read for everybody. The good news there is a video version of it as well. The book comes with a good exercise at the end which is not in the video, so have a look at it too.