No offense, but the book you mentioned is a case study in selection and survivorship bias. They interviewed 350 millionaires (out of how many millions that live

No offense, but the book you mentioned is a case study in selection and survivorship bias. They interviewed 350 millionaires (out of how many millions that live in the US?) and prescribed spending and living habits based on those millionaires' responses. What happened to all of the people who invested, worked, and lived exactly like the millionaires who never accumulated a million dollars? Or bet on the wrong housing market and went bankrupt? Spend less money, save more money -- all fine advice, but the average $40k/year individual can't possibly become "a millionaire" in any sense of the real value of a million dollars. Ignoring inflation then showing $1,000,001 in a bank account in 40 years doesn't really count. As a general rule, pop culture personal finance books exist to make the authors wealthy -- not the readers.