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.
Author Greg Pak does an outstanding job showcasing one of fiction's most diabolical villains. This installment to the Age of Rebellion series expands on Tarkin's monstrous thoughts and actions that we miss out on in the films.
For anyone wishing to see a quick, darker side of one of the Empire's top officials, this is the comic for you. If you weren't afraid of Tarkin before, you will be by the end of the tale.
THE SOUL OF THE DEATH STAR! The EMPIRE has built the deadliest weapon the galaxy has ever seen. But even the most ruthless Imperial officer might hesitate before unleashing the DEATH STAR's power to kill millions in an instant. Behold the secret story of GRAND MOFF TARKIN, the horrors that honed his resolve and the terrifying steps he takes to ensure that the Death Star lives up to its deadly name!