yeah I read those last year, really enjoyed the series. he really doesn't go deep on the 4th dimension, and the other higher spacial dimensions, as much as I'd like tho. it's like woah this is a thing, and we're right at the last blip of a puddle of it. it more kind of ties into the most horrific shit species do to one another in the dark forest than actually a deep dive on higher dimensionality. I fw that opening witht the seige of Constantinople and what seems like weird magic shit and then looping back around way later in the book to explain it after leaving you with questions, that was fun.