Jan and Antonina Zabinski were the keepers of the Warsaw zoo in the time leading up to the Second World War. Their zoo was bombed early in the war, but they managed to work matters so they were still in charge of the grounds and they successfully saved over 300 Jews over the course of the war by hiding them in the cages of the zoo.
I learned a lot about how Warsaw fared during WWII (not well), which I had previously not known at all. "Out of its prewar population of 36 million, Poland lost 22 percent, more than any other country in Europe."
The author wrote a relatively interesting story about an especially interesting topic: humanity during WWII. The story did not always seem to flow as a narrative. The author clearly strove to use unusual or creative verbs, but sometimes seemed to overreach. She also focussed a bit more on animal psychology than interested me.
On the whole I would recommend it to those who are interested in the history of WWII, and to those who like true stories of people remaining brave in the face of deadly danger and remaining humane in the face of brutality.