I kept my copy, because the hats are prettty to look at and someday I might try one (maybe not now that I've read about the errors here on Amazon) but I can understand why someone would be frustrated enough to return this. You don't buy a cookbook without recipes. The point of having patterns/recipes is so that you can replicate something you like. It is not a crime, really, no matter what people who read the Zimmerman books might say.
Not everybody likes charts. I am sorry, but it's the truth. It would not kill these authors to write things out, at least ONCE and please do not whine that it would add to the cost of the book. It doesn't have to, and hey, we have computers now, it's not like you're scribing these books on parchment with a quill pen by candlelight.
There, now that that's out of my system, I would still say to buy the book (though it is somewhat overpriced considering you get such little guidance and that there really are only 9 hats with variations), but it is NOT for beginners, and NOT for those who have better things to do than figure out badly written charts/instructions, even if they DO know how.