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.
WORST AMONG EQUALS: PART TWO! Rogue archaeologist DOCTOR APHRA has ten hours to cross a hostile megacity before the bomb implanted in her throat blows up. No big deal, right? And even if there ARE, say, insane cops and bounty hunters on her tail—she's got a partner to help her! (Unfortunately that would be TRIPLE ZERO: the astonishingly unpleasant murder droid who yearns to see her dead)