Odyssey

The Odyssey was a book written by Homer, obtained by Ezio Auditore da Firenze in the 16th century in Constantinople.

Summary
''A 9th century BCE poem, passed on initially through the oral tradition, that recounts the adventures of king Odysseus as he attempts to return home from a decade of war. Sadly, things do not pan out well for the king and he spends another decade battling Gods, Giants, Sirens, Cyclopses, all the while wondering if his wife hasn't sold the house and moved back with her parents.''

Source

 * Assassin's Creed: Revelations