Volume II of a pair of classic texts — and standard references for a generation — this book comprises all of the subjects of first-year graduate algebra. In addition to the immediate introduction and constant use of categories and functors, it revisits many topics from Volume I with greater depth. 1989 edition.
I started this book my senior year of high school and just finished it halfway through my first semester of college. Needless to say, it is a long read.
It is incredibly interesting, though. I learned lots of new subjects in much more depth than I am used to from other textbooks, and this textbook really did challenge me to think at a higher level. It is quite a step up even from Basic Algebra I.
I really appreciate that Jacobson gives historical context in the development the ideas that he presents, and the exercises make me feel like I am actually participating in the development of these ideas.