Think and Grow Rich is an excellent book.
I don't have it anymore, but I have read it and tried to follow the principles in the book.
I think when we are reading inspirational/motivational books, that there will be different books that speak to each person the most plainly.
The author that speaks to me is Og Mandino, and the book is one of his three great ones, The Greatest Secret in the World.
Actually, it might have been The Greatest Miracle in the World.
I know it is the Ragpicker book, just can't remember which title it goes with at the moment.
As far as I am concerned, you can't go wrong with an Og Mandino book.