Grammar books are instructional texts that provide rules and guidelines for the proper use of language. They cover various aspects of grammar, including sentence structure, punctuation, and parts of speech. These books are useful for students, writers, and anyone looking to improve their language skills. Many grammar books also include exercises and examples to help readers practice and apply what they learn. They can range from beginner to advanced levels, catering to different audiences. Some popular titles include The Elements of Style and Woe Is I, which offer insights into effective writing and common grammatical pitfalls.