Do you make these mistakes in English?

"In this book, linguist Edwin Battistella tells the story of Sherwin Cody and his famous English course, situating both the man and the course in early twentieth-century cultural history. The author shows how Cody became a businessman - a writer, grammatical entrepreneur, and mass-marketer whose ads proclaimed "Good Money in Good English" and asked "Is Good English Worth 25 Cents to You?" His course, perhaps the most widely advertised English education program in history, provides a unique window onto popular views of language and culture and their connection to American notions of success and failure. But Battistella shows that Sherwin Cody was also part of a larger shift in attitudes. Using Cody's course as a reference point, he also looks at the self-Improvement ethic reflected in such courses and products as the Harvard Classics, The Book of Etiquette, the Book-of-the-Month Club, the U.S. School of Music, and the Charles Atlas and Dale Carnegie courses to illustrate how culture became popular and how self-reliance evolved into self-improvement." "This book will appeal to anyone interested in the history of English, the history of business, and American Studies generally."--Jacket.