The most solid route to wealth is by acquiring financial knowledge. Everything that you can learn about money aids in your quest for financial independence. The following books are recommended reading on your path:
The McGraw-Hill 36-Hour Course in Accounting by Robert L. Dixon and Harold E. Arnett
Own Your Own Corporation by Garrett Sutton
Courage to Be Rich by Suze Orman
The Millionaire Next Door by Thomas Stanley
Guerilla Marketing by Jay Conrad Levinson
More Wealth Without Risk by Charles J. Givens
I’ve read own your own corporation and I can say that as far as business books for your own personal knowledge go, this is a great one to get!