Quid Pro Quo

Quid Pro Quo is a memory in Assassin's Creed: Revelations.

Description
Ezio returns from the Yerebatan Cistern and travels back to Sofia's bookshop to show her the map he has recovered from the Templars. Upon leaving the shop, Ezio is confronted by Yusuf Tazim, who asks a favor from him.

Dialogue
Ezio meets up with Sofia Sartor. Ezio shows her one of Altaïr's Keys. Ezio leaves the bookshop. What brings you this way?''
 * Sofia: Salve (Hello), Ezio. That took some time. What did you find?
 * Ezio: Something that may interest you.
 * Sofia: Mio Dio, che meraviglia! (My god, it's beautiful!) And here is my shop.
 * Ezio: Look at the margins.
 * Sofia: Strange symbols. And these are titles of books. Rare books! A few of these have not been seen for more than a millennium.
 * Ezio: Nicolò Polo hid these books around the city. This map should tell us where.
 * Sofia: Hmm. You are beginning to interest me. Vaguely.
 * Ezio: From what I can tell, I need these three books first. They may contain clues to locate the rest of these...
 * Sofia: Molto curioso. (Very curious.)
 * Ezio: Another was found beneath Topkapı Palace, but there is still time to reach the others.
 * Sofia: Found by whom?
 * Ezio: Men who do not read. Sofia, can you decipher this map? Help me find these books?
 * Sofia: Can I borrow them when you are finished?
 * Ezio: We will work something out.
 * Ezio: Yusuf. Salute. (Hello.)
 * Yusuf: Piri told me I might see you here. Did you find what you were looking for?
 * Ezio: I believe so. This is one of Altaïr's five keys. A strange artifact.
 * Yusuf: Ah... it is like nothing I have ever seen. You should keep it somewhere safe.
 * Ezio: ''At our headquarters, si (yes). I will.
 * Yusuf: I am coordinating with our allies today: The Thieves in the Bazaar, the Mercenaries near the Arsenal and the Romanies in the Constantine District.
 * Ezio: You are spread a bit thin, Yusuf. Let me speak with the Romanies myself. I have had so little contact with them in the past.
 * Yusuf: That would ease my mind. If you are in a hurry, you may travel by our network of tunnels. The air down there is a little foul, but the rats are no bigger than dogs. Have fun.
 * Ezio: Grazie. (Thank you.)

Outcome
Ezio leaves the map with Sofia, who starts deciphering it in order to find the ancient books. Meanwhile, Ezio sets off to meet with the Romanies in the Constantine Disctrict.