Benefitting from investment principles in R. Max Bowser's new book, Guaranteed Profits, Warren Kaplan and his wife, Judy, of Boca Raton, FL, have used their profits to travel all over the world. Stu Duerson, Heber City, UT, writes: "If it were not for the success I've had investing in 'Bowser stocks, ' I would not have felt half as confident in retiring at 52."With over three decades of experience with penny stocks, R. Max Bowser proves in his new book, Guaranteed Profits, that diamonds can be found among microcap stocks. The book's subtitle is: "The only stock market system that comes with a $5,000 guarantee."The book is the result of 28 years publishing the monthly publication, The Bowser Report, which is the only newsletter for stocks $3 a share or less. In effect, the newsletter has been a laboratory in which theories were tried out and rejected or accepted.Mr. Bowser has jelled his time-tested investment techniques into a Game Plan, which among other things stresses diversification--owning 12 to 18 stocks. This, in effect, controls the risk that is inherent with these small stocks.The Game Plan calls for purchasing only those equities that have passed the Bowser Rating System, which considers 12 factors, most of which are balance-sheet related. And, since one factor--current earnings--is double weighted, the most a stock can score is 13. However, based on experience, eight or higher places the stock in the buying range.Since a company has to be profitable to get an acceptable rating, all of the stocks that Mr. Bowser recommends are in the black. (He only considers issues that trade on Nasdaq and the New York and American Stock Exchanges.)Furthermore, a unique feature of the GamePlan is the selling instructions. When an issue doubles in price from where it was bought, half of the shares are sold, thus recouping their orignial cost. If the stock continues to appreciate, but then retreats 25% from its high after doubling, the remaining share are sold.