Effective Java : Joshua Bloch In my 23s (2008) when I started my career as a Java Developer it was Effective Java. Applying that rules and talking about them w

Effective Java : Joshua Bloch In my 23s (2008) when I started my career as a Java Developer it was Effective Java. Applying that rules and talking about them with other colleagues makes me better and self-confident developer which other noticed. That leads to better salary negotiations in the future (and my job made me most money). After 10+ years it still helps, because I work mostly in enterprise environments when maturity is way lower and at the same time nowadays lot of juniors joining java community and they are even more junior than I was back in my start of career. For me there is no better way for your wealth building than real knowledge. Learn hard skills, nurture soft skills, work smart. Lot of investment opportunities are just gambling (with money of naive people), choose wisely.