I am a big fan of the Aimée Leduc detective novels, but this one took me a while to get into.
A prequel to the series, this book gives us a 19-year-old Aimée struggling in medical school, losing her boyfriend to another woman -- and deciding on her own to take up an investigation that her father cannot handle due to urgent business surrounding the fall of the Berlin Wall.
In the process, Aimée winds up witnessing two murders that bring her into the purview of former Nazi collaborators and Resistance alike ... and we see a subplot related to World War II as well.
I didn't feel like this book and its mystery was as tightly constructed as it might have been. However, we do get to see Aimée's back story -- how she gets her dog, Miles Davis, how she meets computer genius René ... the whole shebang. I enjoyed it far more on that level than for the mystery itself.