Thorough coverage is given to the fundamental concepts of topology, axiomatic set theory, mappings, cardinal numbers, ordinal numbers, metric spaces, topological spaces, separation axioms, Cartesian products, the elements of homotopy theory, and other topics. A comprehensive study aid for the graduate student and beyond.
This is the best book if you want to learn Topology step by step. The problems are solved in a way that is easy to understand. Not only problems, but theorems and propositions. All the topics are distributed and selected to be found easily, so you can find a particular problem fast. I highly recommend this book.