This novel is also available in the huge Howard omnibus collection I assembled,
The Robert E. Howard Collection.
This collection contains
92 short stories/novelettes/novellas and a novel in categories such as
Weird Menace
Horror
Fantasy Adventure
Historical Adventure
Westerns
Cthulthu Mythos
Other
It is located here:
https://www.mobileread.com/forums/showthread.php?t=22321
Don