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Over 7,000 commonly misspelled words plus a bonus section of the 303 dumbest spelling mistakes make this two great reference guides in one. Information is given on words that sound alike but are spelled differently, and there's an appendix of rules for American English spelling which can be so confusing. Black and white line art help illustrate and visualize the correct definition and spelling for easier retention. An invaluable tool for any kind of written communication.