Cover art
North, Claire. The First Fifteen Lives of Harry August. Redhook 2014.

North, Claire. The First Fifteen Lives of Harry August
Summary: There are "kalachakra" who upon death are reborn to repeat their lives, carrying their memories over to the next iteration. Although most avoid attempting to change history because of the danger it poses to themselves and others, there are others who aggressively try to do so, and must be stopped.
Comments: Not especially allohistorical, but two or three lives of the main character experience greatly sped-up technological advances beginning in the mid 20th century. He also learns of another erased past in which France came to dominate Europe c. 1700.
Published: Orbit 2014 (0356502570BUY); Redhook 2014 (0316399612BUY).
Original in: English.
Translation: French by Isabelle Troin as Les quinze premiègres vies d'Harry August, Delpierre 2014 (2370720042).