A sequel to a book I’d already read. It’s an “epic journey” story involving two teens who decide to circumnavigate the globe for an Anthro Challenge. The catch: one has sickle cell and has never been on Earth before, having been raised on a massive space station. It also takes place in a future time where the earth is primarily (I think?) inhabited by post-human “alloys” which can transfer their consciousness into various bodies. Felt a bit too YA for me in that they encountered a heap of obstacles many of which were predictable by someone older/wiser, but definitely worth reading.