1. The chapters are based on the final drafts on my hard disk and thus do not include changes that were made in the final changes of editing.

2. The published version of the book contains professionally drawn figures, based on originals that I had produced using MacPaint. Those figures currently belong to my publisher, not me, so I have used the MacPaint originals or, in some cases, redrawings done in ClarisDraw. The result is less aesthetically consistent than in the published version, but should contain most of the same information.

3. The published version of the book contained a few cartoon style illustrations; they do not belong to me and are not included here.