Mills of the gods

Ace Books began publishing genre fiction in 1952. Initially these were mostly in the attractive tête-bêche format, but they also published a few single volumes, in the early years, and that number grew until the doubles stopped appearing in about 1978. The tête-bêche format was discarded in 1973, but future double novels were continued for a while, Between 1952 and 1968, the books had a letter-series identifier; after that date they were given five-digit numeric serial numbers. The list given here covers every Ace book that was not a double, published between 1952 and 1978 (or later), for all genres. It gives a date of publication; in all cases this refers to the date of publication by Ace, and not the date of original publication of the novels.