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.
Queen in Disguise is a children's picture book written by Monica Kulling and illustrated by John Alvin. It is a Jedi Readers Step 2 young readers publication which tells a story of Queen Amidala's handmaidens heavily training to protect their queen, without knowing that Amidala herself is training with them.