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.
Grubba the Hutt is missing…and Jabba the Hutt is angry. If Han Solo wants to live, he and his friends will have to find the young Hutt and bring him back to Jabba's palace—immediately. The bounty hunters who have taken Grubba will not give him up easily. Your mission: to track down Grubba and keep Jabba happy…or else.