Spine title: Skullface omnibus.
This collection originally published: Sauk City : Arkham House, 1946.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Skull-face, and others by Robert E. Howard. ISBN 0859780074. Published by Neville Spearman (Jersey) Ltd in 1974. Publication and catalogue information, links to buy online and reader comments.
