The book probably deserves 3 stars, but I was too upset by the ending to give it any other rating than 2 stars. 
 It takes place shortly before the movie the Force Awakens, and it's worth to read if you want to learn more about what happened before the events in the movie. A lot of the book is about politics, so there is not a lot of action, but still, it's quite interesting, even though sometimes it was boring. 
 The book is mostly about Leia, and I pretty much liked how she was portrayed. That is, until the end, where I felt she acted out of character, and that was one of the reasons I gave the book 2 stars. Her reaction to one of the things that happened surprised me and disappointed me. I felt like the Leia I knew from the movies would have done something different. 
 One of the coolest thing about the book was reading about Casterfo. He was a pretty interesting character. But again, it was pretty disappointing to read about him in the end, and that's the other reason I gave the book lower rating. (view spoiler)[ Either kill him and give him a proper goodbye, or let me see him being rescued or escaping. Living his fate uncertain is the worst thing the author can do. I hate when things are left unresolved like that. (hide spoiler)]