From the Preface: "We have preferred to write a self-contained book
which could be used in a basic graduate course of modern algebra. It is
also with an eye to the student that we have tried to give full and
detailed explanations in the proofs... We have also tried, this time
with an eye to both the student and the mature mathematician, to give a
many-sided treatment of our topics, not hesitating to offer several
proofs of one and the same result when we thought that something might
be learned, as to methods, from each of the proofs."