Each section ends with bibliographic and historical notes that trace the development of specific theorems.

Engelking's book with alternative topological texts like Munkres or Willard.

: It omits no details, proving theorems in their most general forms.

If Engelking proves too daunting to locate, or too dense as a starting point, several excellent alternatives exist, each with its own strengths:

The exercises are not mere homework problems; they are a curated encyclopedia of topological counterexamples and secondary theorems, complete with citations to the original papers (e.g., Aleksandrov, Urysohn, Tychonoff).

You can access General Topology by Ryszard Engelking through several online platforms that host the PDF, most notably on Internet Archive