Robin Sharma, but I also found myself literally 3/4 of the way through the book and despite my commitment to finishing the book, I didn't. I wasn't about to put myself through another 1/4 of the same theme and message which Robin already made blindingly clear in the first 3/4 of the book.
Here's my 2 cents on what I think the book wanted me to take away: Don't mind the title, just concentrate on being the best in the world for your position, and your life will change drastically with this minor change in your mindset. Set a good example to show others that greatness can be achieved in every role in this world, no role is too small to make a difference.
I know 2 sentences makes it seem like I'm downplaying a lot of the content in the book, and maybe some of you have already read and the book and can contribute to this post by adding your thoughts in the comments section.