Attached Link: The Poison Master

Another one I really enjoyed is **The Poison Master** by Liz Williams.  It's listed as Sci-Fi, but it also has  very Dark Fantasy feel to it.  A good one to try if you're looking for something that's different from the usual Sci-Fi and Fantasy fare. 

"You don't know what we can see
Why don't you tell your dreams to me
Fantasy will set you free." - Steppenwolf