So, finally my thoughts on best fiction explicitly intended for adults that I read in 2011 (even if it wasn't published in 2011):
Best "Adult" Books:
1. The Marbled Swarm by Dennis Cooper.
2. The Dangerous Lives of Altar Boys by Chris Fuhrman.
3. Never Let Me Go by Kuzuo Ishiguro.
What are the best novels you read this year?