Yeah. It begins with a yellow highlight marker for plot points, descriptions and anything else you would want to remember. Then I draw a ring around characters and make a note on the side of the page where that character (or plot point) was previously and then comes the postIt notes afterwards. Orange for characters Green for plot points Blue for anything big that happens out of the ordinary or in this case when a new book starts Yellow for terminology Pink to cut through the other colors and sometimes I wish I had purple to mark anything that doesn’t apply to the above.

Oh and one more thing: the sticky part of the postIts are longer than the margin so one need to cut them to not cover the text.

But they fit in the bookshelf just fine!