The book 'Group Theory' consist of 9 chapters. The first chapter covers the basic notions of set and functions. The other chapters cover Subgroup, Cyclic group, Normal subgroup, Quotient Group, Permutation Groups, Isomorphism between groups, Automorphisms etc. Each chapter has easy definitions of the topic, Theorems, Sufficient number of Examples, Counter Examples. The theorems and examples are described in a lucid step by step way. A reader can understand the topics described in the book without any guidance.