A shrine to the Doctor is the thirteenth level of Chapter 4.
Brigadier Lethbridge-Stewart: Not just books it seems. All manner of literature. There's an envelope over there from Madame de Pompadour.
Professor River Song: As he spins through time in his TARDIS the Doctor touches billions of lives. From ancient tales of the stranger who entered the city at night and defeated the demons with his magical stick, Through to letters of gratitude, we'll be able to find them all here. Spread out, everyone take a bookcase, move quickly and remember to stay out of the shadows.
Sarah Jane Smith: What are these bottles? They're fascinating.
Professor River Song: Not all knowledge exists in written form.
Jack Harkness: UNIT: Fighting for Humankind?
Amy Pond: Teach yourself Tibetan?
Dorothy "Ace" McShane: H.G. Wells' The Time Machine!
River Song: I'm really glad he's not here right now. Can you imagine just one of them let loose near these books? He'd be bouncing off the bookcases like a pinball.
Martha Jones: I've found it! It's a bit battered, but the front has the name Alison Docherty written on it.
Professor River Song flicks through the book before...
Professor River Song: The book explains that the Toclafane can be short circuited by a current of 58.5 kiloamperes transferred charge of 510 megajoules precisely.
She slams the book shut and smiles.
Professor River Song: Mission accomplished, time to head back to the TARDIS!