Conjure Wife (originally appeared in Unknown Worlds, April 1943) — This novel relates a college professor's discovery that his wife (and many other women) are regularly using magic against and for one another and their husbands.
Gather, Darkness! (serialized in Astounding, May, June, and July 1943)
The Sinful Ones (1953), an adulterated version of You're All Alone (1950 Fantastic Adventures abridged); Leiber rewrote the inserted passages and saw published a revised edition in 1980.
The Green Millennium (1953)
The Big Time (expanded 1961 from a version serialized in Galaxy, March and April 1958, which won a Hugo) — Change War series
The Night of the Long Knives (Amazing Science Fiction Stories, January 1960)
The Silver Eggheads (1961; a shorter version was published in The Magazine of Fantasy & Science Fiction in 1959)
You're All Alone (1972) (the first book edition includes two shorter works as well, reprinted as The Sinful Ones)
Our Lady of Darkness (1977)
Rime Isle (1977) (somewhere between a novella and a two-novelette collection, composed of "The Frost Monstreme" and "Rime Isle" offered as a unitary volume)
The Dealings of Daniel Kesserich (1997) — H. P. Lovecraftian novella written in 1936 and lost for decades