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- Supervolcano, eruption, Harry Turtledove
- Turtledove, Harry, War that came early
- Alpha and omega, Harry Turtledove
- Turtledove, Harry, War that came early, 4
- Coup d'etat, Harry Turtledove
- Supervolcano, all fall down, Harry Turtledove
- Through darkest Europe, Harry Turtledove