For Halloween, a scary book a week till next year's

From Flavorwire, how to string out this Halloween until next Halloween:

The air is getting crisper, the nights are getting longer, and All Hallow’s Eve draws near. You know what that means: it’s time to curl up with a book guaranteed to give you the shivers — or at least make you check the locks twice. Here, for your horrifying pleasure, are 50 of the scariest books ever written in the English language, whether horror, nonfiction, or speculative futures you never want to see. 

How many have you read?