You don't read it in the sense of reading a message; it doesn't work like that. What's happening is that the Shadows are responding to the attention you pay them.
Philip PullmanShe wondered whether there would ever come an hour in her life when she didn't think of him -- didn't speak to him in her head, didn't relive every moment they'd been together, didn't long for his voice and his hands and his love. She had never dreamed of what it would feel like to love someone so much; of all the things that had astonished her in her adventures, that was what astonished her the most. She thought the tenderness it left in her heart was like a bruise that would never go away, but she would cherish it forever.
Philip PullmanMy mother married again after my father's death - another Royal Air Force officer, and a very different kind of man. We went to Australia when I was eight or nine. We lived there for a couple of years, and then came back and lived in North Wales for the whole of my teenage years... I learned how to write poems quite a lot. I just had a good time reading and reading and reading. So that's where I did most of my growing up.
Philip Pullman