Your future earnings dwarf your portfolio — so own more stocks when young

If You Understand This, You'll Never Fear a Market Crash Again · William J. Bernstein

Maintain Your Asset Allocation

I Will Teach You to Be Rich, Second Edition: No Guilt. No Excuses. No B.S. Just a 6-Week Program That Works. · Ramit Sethi

Three to five index funds is all the diversification you need.

The Coffeehouse Investor: How to Build Wealth, Ignore Wall Street and Get On with Your Life · Bill Schultheis

Systematically maintain your target allocation while capturing tax benefits

A Random Walk Down Wall Street · Burton G. Malkiel

Identify and counteract the cognitive biases that destroy investment returns

A Random Walk Down Wall Street · Burton G. Malkiel

Maintain a fixed stock-bond split and rebalance when it drifts beyond thresholds

The Intelligent Investor · Benjamin Graham

Complex investments exist to profit their creators, not their buyers

The Simple Path to Wealth · JL Collins