My favorite book <3. Although I do see how it could get boring. I didn't get bored of it because I watched the movie first and knew what was going to happen. If you like twists in the plot, and you don't like spoilers, I'd say watch the movie before you read the book. I'm glad I did. Both the movie and the book are amazing (I prefer the book though). I like it when books/movies have an unexpected twist. The book is narrated by Death, so he's very blunt about the situation that is presented in the plot. He spoils the ending for you hahaha. Not that that's necessarily a bad thing, I just prefer not having spoilers.
Nevertheless, this is my favorite book of all time. I saw a few people saying that they didn't like the ending, but it's ridiculous to expect anything else from a book about the Holocaust. There's no sugar-coating the Holocaust. If you're looking for an eye-opening and emotional book, this is definitely a good read for you!