From the blurb, I thought this was going to be about Lillian finding out about her roots and trying to research where her family came from and what happened to them during WWII, but that part of the plot doesn't come in until a little over 2/3s of the way through the book. Instead, it starts out with Johann Blumenthal fighting in WWI for Germany, then follows through to his son Paul at the dawn of the Nazis taking over power and Paul's eventual attempts to get his family out of the country. When things are looking grim for them, it then drops that storyline and jumps forward to the 1960s to Lillian, where I thought the story was going to start.
It was a bit jarring to start off, since I wasn't expecting the story to be so linear, but in the end, I found it more effective getting to know the Blumenthal's and seeing their attempts to stay in Germany as long as they could before realizing - perhaps too late - that they needed to flee to save themselves. It was disheartening to see them doing everything they could to be good Germans, in a Germany that cared about them less and less, and to see the small steps that began to segregate the Jews from the main populace more and more until the Nazis were in power and didn't care about being quite so subtle anymore.
This is compounded when they end up in Capetown in South Africa - they're safe there, but all around them is apartheid - which was implemented based on Aryan propaganda and laws.
I did feel at times that the characters were there more to serve as plot points, and Charolette suffers the most from this since she mostly just reacts while Paul is making all the preparations. Knowing how many women worked in the underground and resistance forces during WWII, I would have liked to see Charolette take a more active role.
I also would have liked more time to get to know Lillian so her story arc could have more weight, but seeing her so driven to find out everything she could about where she came from and what happened to her family was touching nonetheless.
The narrator, Jane Oppenheimer, who I first heard narrating The Moonlit Garden, was an odd choice I think for this story. She has a very mellow and soothing voice, which dulled the tension from a story that really should have been tense.