Volume 4. The City by the River

Years have passed. The settlement has turned into a real stone city with a library, forges, and powerful walls. The brothers establish trade with the southern kingdoms, adopt writing and new technologies. But the peaceful dawn is disturbed by news of the mighty King Hammurabi, who is advancing north with a huge army. The city prepares for a siege. The fourth book of the series is about how the civilization they created withstands the onslaught of an empire, about the courage of women and children who stood up to defend their home, and about the fact that even in the darkest hour, hope does not die.