how many different patterns/layouts does the book include? i ask because i couldn't find a description that provided that much detail.
considering that the pattern on the front would most likely sell for at least $7 by itself, if there are more than 4 different patterns in the book then $20 or so is a fair price.
it's 80 pages long. i suspect there are more than 4 patterns inside.
naturally, i hope you find a copy for a price you can afford to pay right now. if not, save up for it. i don't think you'll be sorry in the end.