A book that everyone should have to read as a college student, high school even (if you are so lucky to find it then)... and EVEN as a working adult as a refresher to get you back on track.
There is so much to learn and relearn in this book. It is like the ultimate road map to self love, discipline, and action. I've read the third edition twice, and plan on buying the newest edition to read it again in a year.
Might be the ultimate self-help book. It will have you thinking deeply, taking notes and blowing your own mind. Top 3 recommendation from me.