"The psychology of money" by Morgan Housel
and "the richest man in babylon" by George s. Clason
both are really good to get the concepts and principles on investing and how to deal better with money
I have read the two books and I give an approval for them too with addition of some of the books written by Robert kiyosaki. When it comes to reading books I recommend we read more books from different authors and not focus on only one author. Reading different books gives us different perspectives of how to succeed in life.
There isn't only one path to succeed so getting different angles from those that have already succeeded or have an idea on how to succeed helps alot. Don't go after books that looks attracting because the authors are making it that way to sell more copies. Only read those recommended so you won't be wasting your time.