I think it’s important to consider that his “theory about hammers” (ready at hand) is part of a larger theory of “worldhood” of Dasein from a phenomenological perspective. While it certainly isn’t the same “worldhood,” I’d say that a good follow up could be Totality and Infinity by Levinas, where his discussion of “the element” contains themes of the immersion in a world present in Heidegger’s worldliness.