Change of plan! If you catch typos or other mistakes, please add them to David Spivak's list:

* [Seven Sketches book: Typos, comments, questions, and suggestions.](https://docs.google.com/document/d/160G9OFcP5DWT8Stn7TxdVx83DJnnf7d5GML0_FOD5Wg/edit)

David will copy the mistakes you've already caught to that list, and he thanks you for catching them.