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Quid Pro Quo was a virtual representation of one of Ezio Auditore da Firenze's genetic memories, relived by Desmond Miles in 2012 through the Animus.


Ezio Auditore returned from the Yerebatan Cistern and traveled back to Sofia's book shop.


A favour 2

Ezio and Sofia with the map

Ezio met up with Sofia Sartor.

  • 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: Niccolò 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...

Ezio showed her one of the Masyaf Keys.

  • 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 left the book shop.

  • Ezio: Yusuf. Salute. (Hello.)
  • Yusuf: Piri told me I might see you here. Did you find what you were looking for?
A favour 5

Ezio and Yusuf looking at the Key

  • 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, sì (yes). I will.
    What brings you this way?
  • 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.)


Ezio left the map with Sofia, who began to decipher it in order to find the ancient books. Meanwhile, Ezio set off to meet with the Romani in the Constantine District.


  • The line "You are beginning to interest me. Vaguely." is a reference to a scene from the 1946 film noir The Big Sleep.



Assassin's Creed: Revelations memories
Main memories
Sequence 1: A Sort of Homecoming
The Hangman - A Narrow Escape - A Journal of Some Kind - A Hard Ride - The Wounded Eagle
Sequence 2: The Crossroads of the World
A Warm Welcome - Upgrade and Explore - The Hookblade - The View from Galata - Advanced Tactics - On the Defense - On the Attack
Sequence 3: Lost and Found
The Prisoner - The Sentinel, Part 1 - Guild Contracts - Bomb Crafting - A Familiar Face - The Yerebatan Cistern - Quid Pro Quo - The Mentor's Keeper - Curse of the Romani - The Sentinel, Part 2
Sequence 4: The Uncivil War
The Prince's Banquet - An Uneasy Meeting - The Fourth Part of the World - Signs and Symbols, Part I - Galata Tower - The Mentor's Wake
Sequence 5: Heir to the Empire
The Janissaries - The Arsenal Gates - Arsenal Infiltration - Portrait of a Lady - Signs and Symbols, Part II - The Forum of the Ox - A New Regime
Sequence 6: Fortune's Disfavor
Into the Shadows - Honor, Lost and Won - Bearer of Mixed Tidings - A Little Errand - Signs and Symbols, Part III - The Maiden's Tower - The Mentor's Return - Setting Sail
Sequence 7: Underworld
The Hidden City - The Spy Who Shunned Me - The Renegade - Decommissioned - Last of the Palaiologi - Escape - Passing the Torch
Sequence 8: The End of an Era
Discovery - The Exchange - End of the Road
Sequence 9: Revelations
A Homecoming - Lost Legacy - The Message
Secret locations
Hagia Sophia's Secret - The Impaler's Tomb
Citizen recruitment
The Brawler - The Pupil - The Avenger - The Acrobat - The Beggars - The Pickpocket
Master Assassin missions
The Deacon (Part 1 - Part 2) - The Trickster (Part 1 - Part 2) - The Champion (Part 1 - Part 2) - The Guardian (Part 1 - Part 2) - The Vizier (Part 1 - Part 2) - The Thespian (Part 1 - Part 2)
Faction HQ missions
Unfortunate Son - Loose Lips
Book quests
The Polo Symbols: Hippodrome - The Polo Symbols: Galata - The Polo Symbols: Arsenal - The Polo Symbols: Forum of the Ox - The Polo Symbols: Aqueduct - The Polo Symbols: Church I - The Polo Symbols: Church II
Piri Reis missions
Thunder - Smoke Screen - Cherry - Datura - Caltrops - Smoke Decoy - Sticky Situations - Tripwire
Desmond's Journey
Doubts - Training - Escape - Metropolis - Regret
The Lost Archive
The End Is Only the Beginning - The Order - Abstergo - The Mole - Bleeding Effect - The Truth - The End of the Line