Lourbet, François André. Sortilege Temporel (le temps des mensonges…).
Title trans.: Time Spell: Time of Lies
Divergence: 1610 CE
What if: Henri IV of France lived until 1646, having unified all Europe except England. Later, Louis the XIV brings in England and North Africa, and nuclear energy and space travel are discovered by 1740.
Summary: A time traveleris stuck in a different past.
Published: Daniber 1960.
Original in: French.