Maybe I should have patented the idea

One of the Panopticon surveillance devices mentioned in Bad Monkeys is something called a Library Binding, which can be installed or implanted in a book (the exact nature of the mechanism is never described) and that, among other things, maintains a record of which pages the book is opened to, for how long. Spend an hour studying the phosgene gas recipe in the Golden Book of Chemistry, and Panopticon will know.

What makes this idea goofily paranoid is that it involves books with actual binding...