When it comes to historical fiction set during World War II, it sometimes feels like the focus is more on what was happening in England, France and Germany, than the rest of Europe that was affected. 
With this book, while the main focus was romance with WWII in the background, you get a small glimpse into what is referred to as the forgotten Holocaust, which is the genocide of the Romani and Sinti communities in eastern Europe. 

Part of why I enjoyed reading this so much is because historical fiction is something that I grew up reading and history has been something that I have been interested in for a long time. It also provided a glimpse into a part of history that I had vaguely heard/learned about but didn't know much about.