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.
Anakin and Tahiri journey with their friend Lyric to one of Yavin's other moons—Yavin VIII! There, they must seek to understand an alien culture, battle a vicious monster, and unravel the mystery similar to what they found back on Yavin IV.
While helping their friend Lyric undergo a ritual that will initiate her into the circle of elders, Anakin and Tahiri discover strange cave carvings that explain how to break an ancient curse.