There are plenty of books out there about the Holocaust, but not many that focus on the gypsies. If nothing else you'll come away with a much deeper understanding of that culture. And about further atrocities of the concentration camps. The characters leave a bit to be desired, though.

Lilo and her family live in Vienna, and her father is a respected jeweler. They are Sinti, however, and the Nazis have been rounding up both the Sinti and Roma Gypsies and sending them to concentration camps. For a while, the family is able to stay together, but eventually the father is sent to another camp. Lilo is fiercely protective of her mother, especially when she is able to escape being sterilized but her mother is not. Lilo meets a boy who helps her survive the camp, Django, especially when Leni Riefenstahl, the movie director, commandeers a group of Gypsies to be extras in her movie, Tieflander, that she is filming. There are a few perks to being on the film, such as more food and a better place to sleep, but Leni is a cruel and demanding person who views the extras as completely expendable. This is especially cruel of Unku, a girl who has a flirtation with one of the actors to whom Leni is attracted. Unku disappears, and Leni realizes that she needs to keep her own mouth shut. She has the good role of being Leni's extra for horse riding scenes, and for a while keeps her mother with her by saying that her mother has a way with horses. After Leni's mother dies, Lilo manages to run away and is found by three German scientists who feel they must save her. One has a sister who works on puppet show, and agrees to hide Lilo. Lilo does not leave the apartment for a year, but then goes to work at the theatre, sewing costumes for the puppets. All is good for a while, but then she must run again and survive until the Allies come.
Strengths: Very interesting facet of WWII and the Holocaust. I had heard of Riefenstahl but didn't know details. This reminded me of Moskin's I am Rosemarie (1972) in it's scope of years and variety of experiences. Definitely ordering this one for our 8th grade unit on the Holocaust.
Weaknesses: This could have been trimmed down a bit; some of it rambled. I think that Lasky did a good job of portraying Riefenstahl, although in the afterword she does opine that she was very evil. I don't think that Riefenstahl was admirable in her treatment of Gypsies in the least, but do think that she was a product of her time, and that her motivations and character were probably very complex.