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.
In the third installment of the Episode 1 - Adventures series, Darth Sidious commands his apprentice Darth Maul to do whatever it takes to retrieve something he has lost ... no matter the cost.
Someone has stolen something that belongs to Darth Sidious. Now he wants it back. And when a Sith Lord wants something, there's only one person he can trust to get it— Another Sith Lord.