‘This excellent book was my textbook for 2 semesters of senior level abstract algebra.”this is the best mathematics book I own. I have used it as a suppliment while studying, in research, and in teaching. It is clear and readable.’ ‘the author takes a lot of time explaining proofs in the beginning.
Over time, they leave more to the reader. The exercises are bountiful, and I often find a few interesting ones in each section. I highly recommend this text to anyone interested in higher mathematics. It’s very thorough, yet very readable.’ I would say Lang’s text(s) is/are good for really really advanced students, a third text or so is fine, otherwise he’s abstract, dry and painful and wouldn’t be appreciated as a first or second text.