Swords Series books 1-6 Fritz Leiber Ace Books.
All are in very good to like new condition. Swords in the Mists, #3, is in the worst shape and has one tiny tear and a name written in, it also has the worst creases in the spine. Some of them appear to be first printings and there is a picture of each copyright page. Swords and Ice Magic, #6, is the only one that doesn't have a print date between 1968 and 1973. See pictures.