"For obvious reasons, I never told you about my notebook, with a cover as green as mansions long ago, which I use as a commonplace book, a phrase which here means 'place where I have collected passages from some of the most important books I have read."

Next Quote

You may want to keep a commonplace book which is a notebook where you can copy parts of books you think are in code, or take notes on a series of events you may have observed that are suspicious, unfortunate, or very dull. Keep your commonplace book in a safe place, such as underneath your bed, or at a nearby dairy.

— Daniel Handler