Following two individuals from warring agencies (tribes, companies, countries? I have no idea) as they time travel through threads to thwart the other’s side. One is called Red and is a type of artificial intelligence (I think) and Blue, who is part of the Garden, which is a more organic type of being (maybe?). They begin to correspond by leaving letters in odd places throughout time, such as in seeds, rings of trees and owl pellets. This is an imaginative and beautifully written book but I need more to really love it. More plot, more character development, more world-building, more clarity....just more. Overall, this is truly unlike anything I have read but not something I will ever reread. I received an early copy of this book through Bookish in exchange for an honest review.