It doesn't seem to be one of Robert E. Howard's better known books in discussions, but a Google search brings up a lot of hits. If you can't find a copy, you can download it for free in a lot of formats here: http://manybooks.net/titles/howardrot...
It looks like a good book, and a great choice for a group read, but I'll have to sit this one out. :-) I'm about to start on a science-fiction book that I promised one of my Goodreads friends months ago that I'd read --and the public library will want it back when it's due!
Please keep this thread spoiler free (I will make another for anyone who wants to chat with spoilers).