Trust me, this 2 books are the perfect books for Red Wing Fans!
Although the books is written in Japanese, but it is fine, most of the terms is in english, and, you can understand by pictures/images. One of the best information is they group up all the shoes and last number in the book. So you can see your 875 last number VS other Red Wing shoes, so if you are wearing US9 875, and you really like the last and the fitting. You can refer the table to look for other red wing shoes with the same last number.