I once owned an independent bookstore. No bookseller will be offended if you return a misprinted book. There was probably a mistake with the entire run. If it was a new book, just take it back, explain the issue and they can reorder the book for you. The publisher has probably made another corrected run of the book by now.
You may have to take a gift certificate or store credit while waiting for the book to arrive, but my distributor would get the books to me within 3 days of placing an order. Given, I would only place an order once a week, but the turn around was amazing!
Good luck and so sorry you were missing the patterns. I know it is frustrating!