This is a slow, thoughtful read - it took over half the book for me to really get into it, but I'm glad that I stuck with it. Nao's perspective is heartbreaking and often left me unsettled. While Ruth's perspective lacks much action, I think it created a break for me as a reader, a little reprieve from Nao's troubles. I loved Jiko and that part of the story, but wasn't a fan of the quantum aspects near the end, despite how they relate to the "time being" idea.