They write them.
If you want to have financial success, learn economics.
Start to consider equilibrium, capital theory, labor theory, supply+demand and incentives.
Understand marginal cost, the subjective theory of value, and the basics of money and credit. Oh and the division of labor.
Economics is the study (social science) of human action. It's not boring. It's understanding the story of man up to this point, with a keen eye to understanding the future as it begins right now.
And if you want some philosophy that helps you with business, then certainly take the time to learn about rational egoism. Most successful people pretend to be altruists, because that is what keeps the media and the masses off their asses, but deep down, anyone who is able to sustain success is a rational egoist. It is impossible to sustain dumb luck or karma over long periods of time. It must be purposeful, and motivated by an inclination to (first) profit and then later show goodwill and social conscience through a deeper understanding of trade.
hth
+ rep.