Most topology books stop at compactness, connectedness, and metric spaces. Engelking plunges deep into advanced topics: cardinal and ordinal functions, paracompactness, dimension theory (covering small and large inductive dimensions as well as Lebesgue covering dimension), metrizability theorems (Bing-Nagata-Smirnov), and even an appendix on topological groups.
Noted for its vast collection of exercises, historical notes, and tables showing how topological properties behave under various operations. Accessibility & PDF Availability engelking general topology pdf