[ Tessa wonders if that's an easy thing for mages to do or something only a really talented one can pull off. But he seems so focused on the book itself that she decides she can ask later. ]

Yeah, totally! I think it'd be really cool to see some random bit of knowledge.

[ Though honestly, her real interest comes from the fact that this just reminds her of the internet. That this book is connected to a library feels like Wikipedia. But she can recognize that here in this world, it'd be a bigger deal. ]

So any clue why it's always changing? Like it's a big book, right? Are all the pages filled at once, then they all change at once?