If you liked that book, you should read the original sources from which Robert Greene derived his (too simplified) work viz. the works of Baltasar Gracian, Machiavelli, Francesco Guicciardini, Baldassare Castiglione etc. These are far more nuanced and all-encompassing books on what i call "Worldly Wisdom" i.e. dealing with the World as is rather than how you would like it to be. These sort of books are some of my favourites that i constantly keep going back to.
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