Free book - Karl Is Out Of Opium
Here's the synopsis:
In this short story, a mysterious horde of cannibals called The Sea People has broken into Karl's building and is slowly making its way up the hundred floors to his apartment. While he waits for them to make it to his floor and kill him, he passes time by attempting to chat with his two sex robots. He would rather smoke opium, but he's run out. The only drug left is the mushrooms that his ex girlfriend left behind.
You can get it here.