If someone is interested in learning the origins, history, and development of the English language, then he or she will gain a lot from this book. There are many technical aspects included. It's also enjoyable. Many applied linguistic terms and areas are covered. From English's relationship to Sanskrit and other languages, to the great vowel shift explaining why English often doesn't sound the way it's spelled--difficult and illogical for students learning the language. The author went into depth about such topics as the culture of the Germanic tribes and how demographics influenced the development of the English language the way it did. The Scandinavians, French, and many others have loaded the language with with many loans words. It's a good informative read.