4.9 creative, inspiring, engaging. IMO the best one in the series in terms of the creativity of storytelling. It just blends science, action, and empathy so well. My one issue with the book is I think the end was rushed though somewhat poetically done and think this book could have been split or just longer. And not an issue - I also did not love the main character and some of the how the book ended, but I respect it. I haven’t read a sci fi series like this in so long that really blends and goes hard on the science/math since maybe flatland. And just so creative. Love and highly recommend this series for science lovers.