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.
This series marks an enormously significant moment in not only Star Wars storytelling, but in comics publishing history. After Dark Horse had a 25-year run with the license, Star Wars returned to Marvel! And they did so with a bang. This ongoing series began by featuring some of Marvel's best talents—Jason Aaron and John Cassaday—to perfectly capture the feel of the film that started it all. It picks up in tone and in narrative right where A New Hope left off. It fills in the gaps between Episodes IV and V. Luke even still thinks that Darth Vader betrayed and murdered his father. We find the Big Three navigating their relationships with one another in order to forge the bonds that we see in The Empire Strikes Back. Plus, over time, Aaron develops his own cast of original characters, not the least of which being Sana Solo! Did we mention Luke battling Boba Fett in the abandoned home of Ben Kenobi? This is a series worth the read and the re-read.
The greatest space adventure of all returns to Marvel! Luke Skywalker and the ragtag rebels opposing the Galactic Empire are fresh off their biggest victory so far – the destruction of the massive Death Star. But the Empire's not toppled yet! Join Luke, Princess Leia, Han Solo, Chewbacca, C-3PO, R2-D2, and the rest of the Rebel Alliance as they fight for freedom against Darth Vader and his evil master, the Emperor! But when a Rebel assault goes wrong, Han and Leia must think fast to make their escape – while Luke comes face-to-face with Darth Vader! In the explosive aftermath, a humbled Luke returns to Tatooine to learn more about his mentor, Obi-Wan Kenobi. Meanwhile, Leia and Han undertake a vital – and dangerous – secret mission. But can they succeed without Luke?