In spite of the obstruction of whatever these books were for, I really love these pen-and-ink-over-pages art.
Ein KatzenportrÃ¤t zeichnen lernen
Cat Gestures by ~saraneth672 on deviantART Find more at https://www.facebook.com/CharacterDesign:
I love this piece of art as it shows the variation of hands that have been sketched. The effect of this in the format of a sketch book is that you can experiment in lots of different ways on one page to show the reader or the observer how many different techniques have been used to achieve the final piece.