[Dan Mezick]

I'd pay up to $20 for those sheets with some doc.

Poker and business both pay you heavily for investments in learning. These activities played at higher stakes also PUNISH you for believing you have "figured it all out".

The higher the stakes in the activity, the more you can freely spend on education. $20 is NOTHING for a glimpse of what Harrington or Ferguson see as important in poker research.

Let's say you play Limit. 5% of starting bankroll of 300BB is not too much to spend on education. So if you play say, 10-20, you could spend $300 a year (5% of $6000) and not worry at all about "spending too much on learning".