I have these H P Lovecraft  books.  They are the Ballantine paperbacks from 1970-1976.  All bindings are tight and covers are intact.  All nine books for six credits. PM me if interested.

1. At the Mountains of Madness and other tales of terror

2. The Doom that came to Sarnath

3. The Tomb and other tales

4. The Lurker at the Threshold

5. The Lurking Fear and other stories

6. The Horror in the Museum and other revisions

7. The Dream Quest of Unknown Kadath

8. The Colour Out of Space (This is a Lancer Book from 1969 also tight with an intact cover)

9.Cthulhu Mythos and Kindred Horrors by Robert E. Howard and edited by David Drake.  (This is a Baen Book Original with tight pages and intact cover.  It is ex library, but in good shape.)