1980s SANCTUARY Thieves' World fantasy story anthology 3x vols in one HC/DJ BCE

This is a collection of 22 fantasy stories from various authors edited by Robert Lynn Asprin. It is a 600-page Book Club edition published in 1981. It comes from my brother's estate - he purchased it but I'm fairly sure it was never read. The dust jacket has some wear from being moved around several times on various bookshelves over the last 40 years but the pages & spine are in great shape.