I really enjoyed The Ultimate Investment. It was easy reading, and had great insights and a good, "actionable" moral to the story.
It reminded me a lot of the short book "The Ultimate Gift", and I'd love to see it made into a feature-length movie like that was. The story and moral are different, but The Ultimate Investment movie would have a similar impact: inspiring you to make a few little changes that can drastically improve the quality of your life.
This is a good book to read and share with your teens, too. I don't want to give away the ending, but it addresses a lesson the rising generation is missing, and that we all need to be reminded of.