"The majority of books throughout history are not the heavily decorated and spectacular versions we tend to hear most about, but instead are plain, and fairly ordinary book blocks (which some people still find quite exciting - author included!). For this reason, the techniques are perhaps not as well understood or documented. Luckily the keen eye of the artist has captured precise details when depicting books throughout history, showing sewing structures, stitch types, supports, covers and even how they were stored. In this post we will look at some examples of books depicted in art."
Secret book history! Highly recommended read.