In Assassin's Creed Revelations, which assassin's memoirs does Ezio discover in Masyaf?

Ezio discovers the memoirs of Altaïr Ibn-La'Ahad in Masyaf in Assassin's Creed Revelations.

Revelations connects the stories of Ezio and Altaïr. Ezio travels to Masyaf, the historic Assassin stronghold, seeking keys that open a sealed library. The keys contain memories from Altaïr's life, allowing the game to show important events in Altaïr's later career and the history of the Brotherhood.

The game is set mainly in Constantinople during 1511–1512, but Masyaf and Altaïr's memories provide the historical link to the first Assassin's Creed. Bayek, Edward, and Arno belong to different eras and do not author the memoirs found by Ezio. This dual-protagonist structure is one of Revelations' defining narrative features.