I thought this was a well researched book, but unfortunately there was not a balance between information obtained through research and the story being told. The information was not well integrated into the plot, and interfered with the flow of the story. I appreciate the effort Siegal made in researching the topic, and I generally prefer my historical novels to be based on fact with a lot of factual information included in the story, this just was not the right balance for me.
The other issue I had was the voices of characters were indistinct. Each chapter is told from a different character's viewpoint, and I could not immediately tell which character's view the chapter I was reading was from. This was unfortunate, because there were some very distinct characters and personalities, so I would have liked to read some clear voices for the different characters.
It was a very dry read, and there was little motivation to continue reading despite the interesting subject matter. If you are interested in Rembrandt or this particular painting, you could probably read a non-fiction account and come away with more information, and obtain it in a more enjoyable manner.
I would recommend reading a different book.