You can access General Topology by Ryszard Engelking through several online platforms that host the PDF, most notably on Internet Archive
The text begins with a look at set-theoretic foundations, including cardinal numbers, ordinal numbers, and the Axiom of Choice. Historical Context: engelking general topology pdf
The pragmatic answer: If you are a student with no budget, a PDF scan (usually watermarked or slightly blurry on page 247) will get you through. But you will constantly battle with “page 1 of 533” in a generic reader, missing the plate of counterexamples at the back. You can access General Topology by Ryszard Engelking
First published in 1977 (and revised in 1989), General Topology by Ryszard Engelking (Polish Academy of Sciences) was a landmark event. Before Engelking, standard references included Kelley’s General Topology (1955) and Bourbaki’s Topologie Générale. But Engelking did something different: he consolidated the explosive growth of set-theoretic topology from the 1960s and 1970s. But you will constantly battle with “page 1