Suggestions of books

• What is Mathematics? Second Edition: by Richard Courant and Herbert Robbins, revised by Ian Stewart (available in Indian edition)
• Mathematical Circles (Russian experience): by Dmitri Fomin, Sergey Genkin, and Ilia Itenberg (available in Indian edition)
• Mathematics: A Very Short Introduction: by Timothy Gowers (available in Indian edition)
• Higher Algebra: by S Barnard and J M Child (available in Indian edition): many cheap reproductions are full of typos; beware of them.