One of the trickiest collectibles in Assassin’s Creed Mirage is the Round City Lost Book inside the Palace of the Green Dome.
It appears to be out of reach no matter where you go, but it is possible to obtain it if you progress the main story enough.
There is no way to enter the Palace of the Green Dome early unless there is some glitch that could happen in specific scenarios.
All doors will be locked or barred, including the hole on the rooftop, which serves as the main entrance. Therefore, I suggest not attempting to obtain the Round City Lost Book until you’re almost done with the campaign.
So, in this guide, I will show you when and how to get the only Lost Book in Round City of Assassin’s Creed Mirage.
AC Mirage Round City Lost Book Location
The Lost Book called Al-Sikkit: Diwan Abu Nu’as can be found inside one of the locked rooms of the Palace of the Green Dome in the Round City territory.
I’ve marked the exact location on the map below. I would also recommend unlocking the Viewpoint on the Palace of the Green Dome.
Now, let’s see what it takes to get the Round City Lost Book in Assassin’s Creed Mirage.
How To Get the Lost Book in Round City
In order to get the AC Mirage Green Dome Lost Book, you will need to wait until you reach the primary mission called The Serpent’s Nest.
This is the last major assassination mission near the end of the story. During this mission, you will be tasked with eliminating Qabiha, the Leader of The Order.
Once you begin the mission, you will have the opportunity to retrieve the Lost Book located inside the Palace of the Green Dome. But I recommend retrieving it after completing the mission.
To get the Lost Book, look for a balcony with an awning located on the southeastern side of the building. I’ve marked the location of the balcony in the picture below.
Climb the balcony, where you will find an open door that you can go through. The doorway is only accessible after you finish the main story.
Now, you can access the room with the AC Mirage Round City Lost Book through that doorway. Use Eagle Vision to locate it easily.
To leave the Palace of the Green Dome courtyard, climb up the wall to Harem, located south of the Palace, or go through the Secret entrance located west of the Palace.