Immortality Thief

When linguist and smuggler Sean Wren is blackmailed into a job to get some data off an ancient ship, he's not expecting it to be the Philosopher's Stone: a literal recipe for immortality. Unfortunately, he's not the only one looking. The undying Ministers, mysterious aliens that have ruled over humanity for thousands of years, want the data too. So does the Republic, the last free human government. To add to the fun, the map to the treasure is in a long-lost language, the ship's filled with dangerous traps and genetically-engineered monsters, and the nearby star's going supernova in a few days. Easy job, right?