Brian - I've gotten way more than $10 worth from this book. I bought it on amazon. When the next edition comes out I would prefer to buy it as well.
I've noticed some of the discrepancies but, as you said, after using it for a few hours I was able to adjust for them. Plus I already have great systems for making shots that poolology doesn't work as well for (for me) - such as almost straight in shots and very thin cuts.
It's a critical piece of aiming information for me.
I think we all agree that there is no need for you to send out free copies of the new edition. The original "Poolology" was so reasonably priced in the first place and it's correct enough that we all got the math and coordinates you laid out. Just continue to correct what you think needs correcting and we'll buy the new editions.