Ten years ago, Michael Bierut wrote a column for Design Observer about his notebooks. Over 26 years, he had filled 85 hand-numbered, uniformly-sized, marble-covered books with sketches and lists and ideas. Together, they formed a history of his working life. This piece (or rather the photo that accompanies it, every book stacked high on a chair like some kind of Pentagram monolith) often comes to mind when I’m looking through my own notebooks.