Bryson takes you along for a history of the United States and how our language has changed from English into its current form today. The other half of the book contains chapters dealing with specific topics such as names, the movies and cooking. Each of the subjects deals with the words and phases that entered the language at the time or involving the subject.
There are some reviews that question Bryson's accuracy on some of the items, and this book is not filled with Bryson's usual humor, but the writing is enjoyable with just the right amount of wit throughout. Make sure you check out the chapter dealing with Puritan morality!