8/10 content, 3/10 user interface.

Prime’s Horror Library: A Deep, Dark Treasure Trove (With a Few Dead Zones)

Is it worth it? Yes—if you know where to dig. Don't subscribe just for horror, but if you already have Prime for shipping, the horror section is a massive, messy, wonderful bonus. Bring a friend, a flashlight, and a lot of patience for the UI.