I'd take the 'Elementary' qualifier with a grain of salt here :) - there are more elementary notions of topology (such as point-set topology, continuity, connec

I'd take the 'Elementary' qualifier with a grain of salt here :) - there are more elementary notions of topology (such as point-set topology, continuity, connectedness, compactness etc.) that can already get you pretty far in many practical situations. Thanks for posting this, added to my reading list!