For self study of abstract algebra, I recommend Dummit & Foote. I used it as a supplement to my undergrad algebra classes and found it to be very useful. This is in contrast to some books like Artin which leave a lot to the readers, while not necessarily bad, are sometimes difficult for self-study.
I've learned from both in various undergrad and grad courses and I have to say I like Artin better. Dummit & Foote is a little too dry. I recommend Artin and Dummit & Foote as a supplement.
> For self study of abstract algebra, I recommend Dummit & Foote. I used it as a supplement to my undergrad algebra classes and found it to be very useful.
[0] https://www.amazon.com/Abstract-Algebra-3rd-David-Dummit/dp/...