Book summary services miss the point. A lot of companies charge ridiculous prices for access to vague summaries bearing only the faintest resemblance to anything in the book. Summaries can be a useful jumping-off point to explore your curiosity, but you cannot learn from them the way you can from the original text.*

The most common and sensible location for putting down thoughts, critique or notes was the margin of the medieval book. Consider this: you wouldn’t think so looking at a medieval page, but on average only half of it was filled with the actual text. A shocking fifty to sixty percent was designed to be margin. As inefficient as this may seem, the space came in handy for the reader. As the Middle Ages progressed it became more and more common to resort to the margin for note-taking.

Dots and lines are particularly common ingredients of such footnote symbols. Interestingly, their first appearance is not as a connector of comment and text, but as an insertion mark that added an omitted line into the text.

Evidently, these two groups of bookmarks—static and dynamic—provided very different approaches to marking information—and thus to a book’s use. Readers who added clip-on or “spider” bookmarks anticipated they would need to retrieve information not from one single page but from a changing number of pages. In other words, movable bookmarks served an audience with a shifting knowledge “appetite,” while the static ones encouraged a more “ritual” use of a book. In other words, both types are telling, in their own way, about medieval reading culture.

Step 3: Set up reading storage and a reading environment.

Jesuit manuals such as Jeremias Drexel’s Aurifodina, subtitled The Mine of All Arts and Sciences, or the Habit of Excerpting, explained how to best take notes from reading to create commonplace books: personal notebooks of reading extracts that contained the religious, ethical, and political maxims deemed necessary to lead a good life. There were even admonitions about which texts not to read and how not to fold page corners or to mark texts with fingernail scratches.