Rich Dad Poor Dad (Robert Kiyosaki)

The most controversial finance book ever written. Kiyosaki contrasts his real father (the "poor dad" who believed in job security) with his friend's father (the "rich dad" who believed in assets and cash flow). The core idea — your house is a liability, not an asset — infuriated traditional financial planners. Critics point out that the "rich dad" may be fictional and the advice oversimplifies. But 32 million copies later, it undeniably changed how an entire generation thinks about the difference between working for money and having money work for you.