By Rob Suggs So many public domain e-texts, so little time—and guidance. That there's the rub. Ever had this happen? You spot an intriguing title in the Gutenberg feed, or on some other free text site. New e-reader food? Maybe. What's the book about? Like all public domain texts, it dates before the Great Rise of the Subtitles, sadly. So this thing is merely called "The Amazingly Indescribable Thing," or something equally vague, by Lucius Q. Oldenscribe. The cover is a photo of a ragged, black-clothed library book with that title. By sheer reflex, your eager little fingers are instantly Googling title and...