The Book of Ezra is about how the people of Israel returned from Babylon and tried to worship Yahweh again as the law required. To do this they needed to rebuild their temple so they could sacrifice to Yahweh.
The Book of Ezra is named for the priest Ezra who led the first group of Jews out of exile and back to Judah. Translators can use the traditional title "Ezra." Or they might choose a clearer title, such as "The Book about Ezra."
Foreigners worshiped many false gods. Yahweh did not allow his people to marry foreigners. He knew this would cause the people of Israel to worship false gods.
Many of the Jews remained in Babylon instead of returning to the Promised Land. Many were successful in Babylon and desired to remain there. But this meant that they were unable to worship Yahweh in Jerusalem.
Some of the events in the Book of Ezra are not told in the order they actually happened. Translators should pay attention to notes that signal when events are probably out of order.