I’ve been very much enjoying Brian Lumley’s House of Cthulhu (Primal Land tales).  They seem to me to be a highly delicious slice of Sword and Sorcery in the vein of Clark Ashton Smith (though with a lot less of his wonderfully purple prose, but atmospherically written none the less).  I flag here because the tales seem to be very much in the vein of Hyperborea (sans the weird science) and are available on Amazon.  One thing to note, so far as I have got, the Cthulhoid aspect is more set dressing than taking a central theme or place, but lend the appropriate sense of ancient horrors lying in the shadows.