I am partial to the Clark Ashton Smith reprints from Necronomicon Press. They are hard to come by, but worth tracking down. The Book of Hyperborea and Tales of Zothique have stories that are all reprinted in the Collected Fantasies of Clark Ashton Smith series, but I do like being able to carry these stories in bite sized chunks. 

Chaosium has reprinted three volumes of different stories from Clark Ashton Smith, The Book of Eibon, The Tsathoggua Cycle and The Klarkash-Ton Cycle. The first two are all right, but there are a lot of other stories written by people playing around in Clark Ashton Smith’s sandbox. However, the Klarkash-Ton book is all Clark Ashton all of the time. It is very nicely done. 

I’ve also enjoyed the Averoigne Archives ebook.

It is wonderful to have so many books available of his work after it being so hard to find for so long. I would also say that it is wonderful having a game that points back to its source material so well.

Thanks,
VR/Scott