Storyline: 2/5
Characters: 2/5
Writing Style: 3/5
World: 2/5
I chafed at the condoned maliciousness of the series first, Chthon. Behind that though, there was a neat story and an engrossing exploration of a new world. Chthon left dangling clues and unresolved allusions that had an enigmatic allure. So I went back for the second and final in the series hoping that Anthony would drop the brutishness and build on the mystery and ambience. I was sorely disappointed.
Anthony continues to indulge his fascination with violent sexual scenes. He does, at least, spend more time providing a justification for it in Phthor, thus it is less shocking than in Chthon. The worldbuilding and plot preparations that held so much promise in the first book were filled in rather than expanded here. Essentially, we looked at the same picture but with more detail.
There were a few glimpses of that allure I had spotted in the first. The hinted at larger plot of Chthon found grounding with an imaginative but undeveloped backstory based on chemistry and sentience. The origins of the chill wave, likewise, held promise that was never fulfilled. Ultimately, I don't think Anthony knew how to pace a conclusion. In the first he didn't have to resolve all those clues and allusions. Attempting to do so here, he shoved in new information the reader hadn't been prepared for, connected wildly disparate ideas, made abrupt changes to characters and timelines, and finally settled grand designs that we had only been vaguely aware of. Most of this was done in the last 20 pages. It is too bad. Some books are simply bad all the way around. Some are adept with mediocrity. Both Cththon and Pththor had the inklings of something great but were tainted by perversity and shorn through brevity.