Missing a Leiber Book, Huh

I was going through my books and dug out all of my Leiber Fafhrd & the Grey Mouser stuff, because, mostly, I was re-reading old Glen Cook stuff and he mentioned Leiber a lot.

Here is what I have:

I disliked Knight & Knave of Swords so much I don't own a copy. But I also seem to be missing The Swords of Lankhmar. I'm not sure why; I'm sure I owned all seven (two duplicate others) at one point.

I think it's time to fix this! It's not my favorite, but it's sad to see it missing from my collection and not handy to read from when the mood strikes me.