I suggest going back to the source! Read the original gothic books, like Wuthering Heights, Jane Eyre, Frankenstein and Dracula. Other fantastic gothic stories include Charles Dickens’s The Mystery of Edwin Drood and Great Expectations. Of course the Gothic stories are all the rage now. Yet the classics are the root of these stories. Reading these will give you an appreciation of the genre, and where modern writers are borrowing from. While they do not all have supernatural elements like angels and vampires, they are very scary.