The category of fantastic fiction includes science fiction, fantasy, weird fiction, and some pulp fiction like Doc Savage:

• Title Index for Fantastic Fiction
• Author/Editor Index for Fantastic Fiction

Non-fiction works include anything the author wants you to believe is true as well as more speculative works. They are indexed by subject:

• Black Death
• Economics
• Espionage
• Old West
• Polar Exploration
• Roman
• World War One
• Miscelleaneous