What is a good introductory book on quantum mechanics? I hope to learn the proper mechanism.this book will not help. It will develop theoretical concept only. As a starter, you have to learn calculus,linear algebra mainly matrix operation to understand QM. After that you can study Arthur Baiser (this book has little easy description) and then you can go through Quantum Mechanics by D J Griffith and also QM by Nouredine Zettili.