Is it worth checking out? emphatic yes
Summarize? I will try, and probably not do a great job; I'm still digesting it.
The world is both "nebulous" [1] and patterned; observed patterns aren't really out there so much as a combination of "there" and in our mind. Some of these patterns are incredibly useful. One pattern is "the rational / modern world view", which lets science work. It is very good, but not complete.
Post-modernism noticed that no pattern is a perfect fit on the partially-nebulous world, and went nowhere with that, and ended up in a nihilistic, bad place. That isn't good.
The goal is to see patterns as useful, conventional truths, not ultimate truths. Then you can pick the right pattern / conceptual framework with which to approach a given situation.