Nathan Jacobson's books "Basic Algebra I, II" and "Lectures in Abstract Algebra - Volumes I, II, III (GTM 30, 31, 32)". What are the differences between these two books?
1) The subject.
The material of the two books overlap, which one is better?
2) Does "Lectures in Abstract Algebra" aim to undergraduate?
3) "Basic Algebra I, II" Cannot edit a word! Really?
4) Is it necessary to read the two books?
Thanks a lot!