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.
Before their military heroism in the Clone Wars, before their tragic battle on Mustafar, and many decades before their final confrontation on the Death Star, they were Master Obi-Wan Kenobi and his young Padawan, Anakin Skywalker. Now join them a few years into the "chosen one" Anakin's training. Teacher and student have grown closer over time, but it's been a difficult road. And things aren't about to get any easier. In fact, when they are called to a remote planet for assistance, the pair may be pushed to breaking point. As they find themselves stranded on a strange world of primitive technology and deadly natives, will they be able to save themselves? First they must learn who called for help…and why!