That book is so-so in my opinion. Here is a book that might interest you, it's called "How to Make a Living Trading Foreign Exchange: A Guaranteed Income for Life" (Wiley Trading)
Oh dear, does it get any better than this??? http://www.tradingsmarts.com/content.htm#buy I had several orgasms just reading the first few paragraphs of the web page
Statistics do not work in trading. A book on such would probably not get through professional panels nor the editors.
I certainly fully agree with you. I use Boolean Algebra exclusively. Making 20% a year is something most people feel works quite well. these are "advanced level" corporations who have employees that think 20% a year is just what the regulators ordered.