Are there any other philosophical school of thought that deals with the topics that postmodernism deals with other than postmodernism itself?

Hello,<br><br>I've been reading a book on postmodernism, one of those for dummies book to be more specific and everything I've read so far makes a lot of sense to me. I agree with a lot of the things that thinkers in the postmodernism camp have said, but I just dislike how vague the whole philosophy is outlined. So I'm wondering whether there are other schools of thought that deal with the topics that postmodernism deals with but in a more solid and concrete way?<br><br>I've already looked into post-structuralism, which seems to me to be identical in spirit with postmodernism just with more emphasis on structuralism, and I've also looked into situationism which I think is more closely related to marxism (from what I understand situationism is just anti-capitalism thinkers that are critical of how marxism was perceived in the 20th century). I also find the ideas of the Frankfurt school to be very similar with those of the postmodernists in fact I've often found postmodernists to reference thinkers from the Frankfurt school. <br><br>So in short, I like the ideas of thinkers such as Lyotard, Foucault, Deleuze, Baudrillard, Butler and I was wondering where to go from here, what else should I read or what should I look into next?<br><br>Thanks!