If you've ever gone flawless (9-0 in Trials of Osiris) than you've been to the lighthouse. In the lighthouse there are many open books with a blue and orange symbol/orbs design. I had never seen any of these before. While trolling around the tower checking out the new collections I stumbled upon a book in the jukebox room. In the far back where you can sometimes find Xur, there was a book with a familiar looking symbol. You guessed it, it was the same one that I saw in the lighthouse. Does this mean Osiris/a follower of Osiris in/has been in the tower? What are your thoughts?