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.
Sun Star Against Shadow Stone was a children's book based on the Ewoks animated series episode of similar name. Published by Dragon Picture Books in the UK in September 1987, the book was illustrated with images from the actual episode.
The title on the book reads "3. Sun Star Against Shadow Stone", indicating it is the third book in the series. The title of the book is also different in that Sunstar and Shadowstone are broken to be two words instead of one.