The Little Book That Beats The Market - Joel Greenblatt

I recieved that book a week ago from a friend who trades for a living. The book deals with a strategy for a long term investment with an above average yield and this by using the suggested "Magic Formula" that described in it.
The book (actually a booklet) is written for non-professional investors (or investors to be) using an easy language that mixed rightly with cynical humor, making the reading a real fun.
At the end of the book (which comes very quickly) the characteristics of the "Magic Formula" are known and can be implemented by anyone who is willing to gain a yield of at least 15%+ a year in the next decade - looking forward to a wealthy pension.
In short, the "Magic Formula" gives a realistic method for selecting stocks for investments based on economical ratios that are well known for each one of the stocks by using regular and standard means. Each of such stock is than added to the portfolio for one year. The portfolio contains 30 stocks on average and the overall investment "system" was checked with real data by using the historical values of the last 17 years - Interesting.