""A Language Series: Book One"" is a book written by Robert Comfort Metcalf and published in 1910. It is a language learning book that aims to teach the English language to beginners. The book covers topics such as basic grammar, vocabulary, and sentence structure. It also includes exercises and activities to help learners practice their skills. The book is designed for self-study or for use in a classroom setting. It is written in a clear and concise...