Anyone who has studied abstract algebra and linear algebra as an undergraduate can understand this book. The first six chapters provide material for a first course, while the rest of the book covers more advanced topics. This revised edition retains the clarity of presentation that was the hallmark of the previous editions. From the "Rotman has given us a very readable and valuable text, and has shown us many beautiful vistas along his chosen route." --MATHEMATICAL REVIEWS
I learned the basic information about group theory: groups, Isomorphism theorems, permutation groups, Sylow theorems, Normal series, solvable, supersolvable, nilpotent and so on...
Reading this book was an entertainment for me :] Since it is only about groups, it introduces many elegant theorems and corollaries in its text and its exercises.
Starting slowly, this book is very good for everyone who want to self study seriously group theory. This is by far the best book I have on this subject. The difficulty is very gradual and there is a real dedication of the author to make understand the concepts to the reader. A very good book, easy to read in the first chapters, less in the last.