I found The Thirteenth World to be a satisfying and emotional conclusion to the series. It was action packed and full of interesting scifi moments that kept my attention as a reader pretty well. The narrative in the novel did have its boring moments, but overall it was a very captivating story. I found the concept of being able to travel through the multiverses at will to be epic. It was exciting and added a uniqueness to the main character Stel. Without a doubt, through this novel you can watch the characters grow and change as they face new dangers and complications in their mission to save the worlds.
I enjoyed this novel, and think some young adult scifi readers would simply fall in love with this series. I give The Thirteenth World FOUR OUT OF FIVE STARS!!!