Computer algebra Book

I bought this book as complement to this other book while studying an undergraduate degree in Maths.
The books is OK in terms of exercises, but I don't perceive it is very clear in terms of exposing the theory. Also, the book has too many typos and errors and it is poorly edited. It is difficult to visually separate what are examples vs theorems. Not quite recommended as an introduction to Set theory (although in terms of exercises it may help to people studying it