Cover art
Stirling, S.M. To Turn the Tide. Baen 202.

Stirling, S.M. To Turn the Tide
Divergence: 165 CE
What if: Modern knowledge was introduced to Europe during the early Roman Empire.
Summary: As some future Earth is on the verge of nuclear destruction, a group of graduate students are sent back in time to Austria during the reign of Marcus Aurelius.
Comments: The similarities with L. Sprague de Camp's Lest Darkness Fall are acknowledged.
Published: Baen 2024 (1982193530BUY).