The New Book of Mathematics – Class IX, Volume II by M.L. Aggarwal is a comprehensive mathematics guide for Class 9 students, published by APC Books (Avichal Publishing Company). Based on the latest NCERT syllabus, NCF 2023, and NEP 2020 guidelines, the book provides clear explanations, step-by-step solutions, practice exercises, MCQs, assertion-reason questions, and case/source-based questions. It is an excellent resource for concept building, problem-solving practice, and exam preparation.