Amassing wealth is as simple as distinguishing between what you need and what you want, intones actor Eric Conger, reading the work of economics professors Dwight R. Lee and Richard B. McKenzie. Do you need the new car, or will a used car get you to work and the grocery store just as well? Your eyes may glaze over in certain sections, as Conger reads long if-you-do-this-you'll-save-that lists, but the points made are important. Every dollar you save and invest now is potentially worth $10 or $20 or $100 at retirement. The advice here is remarkably specific, right down to the savings you'll amass from grilling your own steaks in your backyard rather than eating out in a restaurant (about $50 per dinner). Even better, the simplicity of the professors' ideas makes listening to this audiobook tremendously motivational. You'll want to start putting their ideas into practice today, brown-bagging your lunch and leaving your credit cards at home. (Running time: 3 hours, 2 cassettes) --Lou Schuler