You turn the photo around by chance and see a note.

It reads, "You are probably wondering where you are and who you are. I can't say much about that. I will , however, give you the way out. behind one of the shelves, there is a small door. That will lead you out of this building. From there, you will have to make your own journey. Good Luck"

There is no name written

Go straight out the secret passage

Continue to explore