Related Clues:

• Haunting
• Like an unmatched sock
• Like Poe tales
• À la Poe
• Hitherto unknown
• "That's strange"
• Puzzling
• Appropriate for Halloween
• Screwy
• Uneven
• Roulette option
• Like 1, 3 or 5
• Lacking a mate
• Curious
• Like Simon's couple