I just started Hans after purchasing this book! I have been crocheting for 6 months. I also had not heard of single rib crochet and when I googled it I found differing methods. One tutorial said it is simply crochet in back loop only for each round. I knew that would not come out to look like the ribbing on Han's hat. I then looked in the book and Yan had the stitch explained on page 33 so I was so happy to find that!! I don't know if I will make all 20 animals but I am excited to make several more! Thanks for posting this! I want to check out your etsy shop next!