If you are a parent or guardian I highly recommend "The Yes Brain" by Daniel Siegel, M.D., and Tina Bryson, Ph.D. It was recommended to me by both our pediatrician and our dentist, who both have several children.
In a world where there are limitless options for what type of humans to raise, I strongly believe that the best thing you could teach your child is "courage, curiosity, and resilience". Which is exactly what this book teaches you to teach your kids.