The book “Study of Nouns, Pronouns, Adjectives & Article (detail study)” begins with letters, words and syllables, and then gradually it deals in details of three parts of speech- Nouns, Pronouns and Adjectives including the uses of Articles. The book shows how Cases dominate different functions of Nouns as well as of Pronouns. It has included roles of Nouns to form Nominal Compounds, Prepositional Objects, Complements besides forming Adverbial phrase, Subject and Object. It illustrates the use of Adjectives, the formation of degrees, position and proper arrangement of Adjectives and others.