I love the patterns in this book. Unfortunately there are a number of errors, and Interweave has published a set of PDF files on their website with corrections. Their files do not include an error I found in the Whirlpool pattern, however. On page 60, under Heel Flap, 2 lines down, the pattern should read: slip 2 (0,7)I'm beginning a new set of socks using Patons new Stretch Socks yarn.