This book Abstract Algebra has been written primarily from student's point of view. So that they can easily understand various mathematical concepts, techniques and tools needed for their course. Efforts have been made to explain such points in depth, so that students can follow the subject easily. A large number of solved and unsolved problems have been included in each chapter to make students familiar with the types of questions set in various examinations. This book is intended to supply the typical freshman and related disciplines with a first exposure to the mathematical topics. The author feels great pleasure in bringing out this book. This book has been written keeping in mind all points at which student feel difficulty.