Fun! Stephenson’s obsession with many-worlds theory strikes again, this time manifesting itself as magic: witches were real and reaching across various worlds to manifest things into this one. This is the basic premise behind Stephenson and Galland’s joint work. There is a lot to like in this book which has more of a traditional story structure than previous Stephenson works. I really enjoyed the many different forms that you find in the book: there are fictional emails, corporate chats, memos from HR, posts from the internal wiki, letters, and even a Norse poem.
Since I was traveling when I read the book, I read it on the Kindle which diminished the experience a bit. I think that all of the various forms that you find in the book would be better experienced in a physical book.