Most unearthly
Else clues• Halloween superlative
• Least explainable
• Like H. P. Lovecraft among all popular writers?
• Maximally uncanny
• Most chilling
• Most creepy
• Most frightening
• Most Halloweenlike
• Most inexplicable
• Most like a ghost
• Most like a Poe tale
• Most likely to cause goose flesh
• Most likely to cause horripilation
• Most macabre
• Most mysterious
• Most peculiar
• Most spooky
• Most strange
• Most supernatural
• Most Twilight Zone-like
• Most uncanny
• Most unnerving
• Most unsettling
• Most unusual
• Most unworldly
• Most weird
• Spooky to the max
• Superlatively Halloweenlike
• Superlatively Kafkaesque
• Superlatively spooky
• Superlatively strange
• Superlatively uncanny
• Superlatively weird
• Supremely spooky