B. S. Grewal is a prominent Indian author and educator known for his contributions to the field of mathematics. He has written several textbooks that are widely used in schools and colleges across India, particularly in subjects like algebra, calculus, and statistics. His books are appreciated for their clarity and structured approach, making complex concepts easier to understand for students. In addition to his writing, B. S. Grewal has also been involved in teaching and has held various academic positions. His work has significantly influenced the way mathematics is taught in India, helping to improve students' understanding and performance in the subject.