Historical clue formulations

• 100-page stories, say — 2017-12-12
• Orwell's "Animal Farm" and Kafka's "The Metamorphosis," for two — 2016-11-30
• "Billy Budd" and "Of Mice and Men" — 2010-06-30
• "Death in Venice" and "Of Mice and Men" — 2008-08-24