Here are corrections for the substantive mistakes I've caught in the first printing of the book, or that others have been kind enough to point out. These have been corrected in the paperback edition, along with various grammatical errors that I'm not bothering to list here. (Some of the grammatical errors are incredibly stupid, so why should I highlight them here?)
p. 87. Okay kids, you're off the hook. Bill Gates didn't develop the DOS operating system when he was seventeen. Thanks to Doug Phillips for this correction (click to see his letter of correction).
p. 210. The Library of Congress picture is from 1980, not 1890.
p. 257. Barbara Friedman Polansky's first name has only three a's.