More uncommonly sensible investment guidance from a master of the game. Drawing on his experience at Fidelity's Magellan Fund, a high- profile vehicle he quit at age 46 in 1990 after a spectacularly successful 13-year tenure as managing director, Lynch (One Up on Wall Street, 1988) makes a strong case for common stocks over bonds, CDs, or other forms of debt. In breezy, anecdotal fashion, the author also encourages individuals to go it alone in the market rather than to bank on money managers whose performance seldom justifies their generous compensation. With the caveat that there's as much art as science to picking issues with upside potential, Lynch commends legwork and observation. ``Spending more time at the mall,'' he argues, invariably is a better way to unearth appreciation candidates than relying on technical, timing, or other costly divining services prized by professionals. The author provides detailed briefings on how he researches industries, special situations, and mutual funds. Particularly instructive are his candid discussions of where he went wrong as well as right in his search for undervalued securities. Throughout the genial text, Lynch offers wry, on-target advisories under the rubric of ``Peter's Principles.'' Commenting on the profits that have accrued to those acquiring shares in enterprises privatized by the British government, he notes: ``Whatever the Queen is selling, buy it.'' In praise of corporate parsimony, the author suggests that, ``all else being equal, invest in the company with the fewest photos in the annual report.'' Another bull's-eye for a consummate pro, with appeal for market veterans and rookies alike. (Charts and tabular material— not seen.)