I Will Teach You to Be Rich (Ramit Sethi)

Ramit Sethi wrote the anti-deprivation finance book. Instead of telling you to skip lattes, he builds automated systems so you can spend guilt-free on what you love while your money handles itself. The 6-week program covers conscious spending, negotiating bills, automating investments, and optimizing credit cards. The 2019 second edition updated everything for the app economy. It's the only personal finance book that explicitly says "spend more on the things you love."