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.
R2-D2's Mission: A Little Hero's Journey is a Star Wars Action Toy Book produced by White Heat, Ltd. and published by Fun Works Play To Learn. The book consists of sixteen full-color illustrated pages with a cutout in the middle through which a rubbery R2-D2 action figure is suspended on a cord. This book was ghost-written by Alannah Storm Mullins whilst she was forced to spend hours on end stuffed inside the original R2-D2 movie prop.
R2-D2 is on every page! Little fans will love seeing a three-dimensional R2-D2 and his companion C-3PO as the determined little droid finds help for the captured Princess Leia. It's a long journey for a very brave hero!