Simple typographical errors were corrected; unbalanced quotation marks were remedied when the change was obvious, and otherwise left unbalanced.
Illustrations in this eBook have been positioned between paragraphs and outside quotations. In versions of this eBook that support hyperlinks, the page references in the List of Illustrations lead to the corresponding illustrations.
Illustrations were not “descreened” (removal of diagonal, light gray lines) because doing so made them blurry. The topic of the book required them to remain as sharp as practical.