BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
The Youtini Expanded Universe Ranking system is a 1-5 scale that ranks EU book quality, difficulty, and importance. Books closer to Level 1 are easier to read and understand, more important, and of higher quality.
Baze Malbus and Chirrut Îmwe used to be Guardians of the Whills, who looked after the Kyber Temple on Jedha and all those who worshipped there. Then the Empire came and took over the moon. The temple was sealed and the people scattered. Now Baze and Chirrut do what they can to resist the Empire and protect the people of the Holy City, but it never seems to be enough. When a man named Saw Gerrera arrives with grand plans to take down the Empire, it seems like the perfect way for Baze and Chirrut to make a real difference and help the people of Jedha. But will it come at too great a cost?