I remember this boy as a kid, so I had a basic idea of the plot. I felt the book was a good fit for my level, not too hard but challenging enough. All of Kristina’s books are well done with just enough info to engage you and push your learning, for me listening and reading have helped my Russian understanding and I highly recommend her products.
I have read several of her books and often use these in conjunction with the origin book or movies to increase comprehension.