I just re-read The Sky People recently, so this was on my mind, as I know he has a hard on for cannibals, either making them into sadistic villains or human vermin. But I didn't realize until I stepped back he uses it as a trope in almost every single series.
Off the top of my head.
1. Draka - Never read the series, didn't interest me because it was so implausible. But I seem to remember hearing a female villain in the later books consumed human flesh.
2. ISOT - There was definitely at least one cannibal villain, who was, IIRC, an Asian woman from the present. I can't remember if there was any cannibalism suggested from the extant bronze-age cultures in the books.
3. Peshawar Lancers - Cannibals abound, both in terms of "human vermin" (especially in Shikari in Galveston), and sadistic villains (the Russians)
4. Emberverse - Here, the implausible cannibals all seem to be of the "human vermin" sort, as the big baddies of both sub-series eschew human flesh.
5. Lords of Creation - At least the subhuman vermin in The Sky People actually not quite human, although his one-dimensional ravenous Neandertals are laughable, particularly in that they begin eating people in the middle of freaking combat. I don't remember any cannibalism at all in In the Courts of the Crimson Kings, which was part of the reason I found it one of his most enjoyable books.
6. Conquistador - I don't recall any cannibalism, but this novel was so unpleasant to read that I might have glossed over some reference to the Aztecs still performing it or something.
Anyway, what did I leave out?
Off the top of my head.
1. Draka - Never read the series, didn't interest me because it was so implausible. But I seem to remember hearing a female villain in the later books consumed human flesh.
2. ISOT - There was definitely at least one cannibal villain, who was, IIRC, an Asian woman from the present. I can't remember if there was any cannibalism suggested from the extant bronze-age cultures in the books.
3. Peshawar Lancers - Cannibals abound, both in terms of "human vermin" (especially in Shikari in Galveston), and sadistic villains (the Russians)
4. Emberverse - Here, the implausible cannibals all seem to be of the "human vermin" sort, as the big baddies of both sub-series eschew human flesh.
5. Lords of Creation - At least the subhuman vermin in The Sky People actually not quite human, although his one-dimensional ravenous Neandertals are laughable, particularly in that they begin eating people in the middle of freaking combat. I don't remember any cannibalism at all in In the Courts of the Crimson Kings, which was part of the reason I found it one of his most enjoyable books.
6. Conquistador - I don't recall any cannibalism, but this novel was so unpleasant to read that I might have glossed over some reference to the Aztecs still performing it or something.
Anyway, what did I leave out?