This might be useful in going up against newbies, or the moronic. However, if you are in a long term savvy league (like me) there is nothing here to gain. I'll save you money - trade for marginal value. Ta da! All the valuations are geared towards a roto auction draft. It is useless for snake drafts and his psychological tricks theory applies poorly to online leagues where communication is strictly by email. Also, the system does not account for Head to Head leagues where those ten homers in the first month mean nothing at the end of the season. To be fair, he does dedicate about five sentences to Head to Head in the book - all to say his theories apply just as well. I'll just read the Baseball Prospectus next year and end up first in both my leagues (again) without this tripe.