I had the very pleasurable experience last night of holding and examining the actual Codex. My girlfriend had managed to source a copy via ILL at her library. It’s even better in the flesh than it is online; it was fascinating to page through, noting textual similarities, the development of images, and simply appreciating the beauty of it. It’s a lovely work that dares you to decipher it. I’m looking forward all the more to when my own copy arrives in a few weeks (shipped this morning).