I enjoyed this book. It’s a little more complex than the first one in that there’s a little more interpersonal stuff going on and a little less “How do we deal with this catastrophe” There is also a little more random number talking which I am always surprised at (like I get that she is a calculator but lists of numbers when they’re doing “space things” makes for sort of odd reading"). A lot less Nathaniel in this book which is too bad but generally speaking this is about going to Mars, it’s very space-y, it’s a great sequel to the previous book and I look forward to more.