All three of these Robert E. Howard books are Berkley Putnam Book Club Edition from 1977.
Hardcovers with dust jackets, they are all in very good condition with only minor edge wear.
THE HOUR OF THE DRAGON
THE PEOPLE OF THE BLACK CIRCLE
RED NAILS
Look at the photos, and let me know if you have any questions.
I will send them to you by USPS Media Mail.