From audible.com:
A breakneck adventure for the Serenity crew in the seventh original novel tying into the beloved Firefly series from creator Joss Whedon
A simple job
Serenity is bound for the planet Kerry with a hold full of sealed unidentified cargo for the planet’s highest-ranking nobleman. The duke is a surprisingly genial man whose court brings all the fanciness and fun of Persephone’s high society but little of the pretension—and, most importantly, he’s got the promise of more work.
Some fine hospitality
Obliged to stick around while Inara is with a client—and hoping to score future employment—the crew settles in. The liquor flows freely at court, and there’s food, entertainment, and comfortable lodgings to enjoy. Everyone is thrilled but Zoë. Her gut says something is off.
A vicious massacre
When the duke’s estate is attacked in the middle of the night, Mal sends Serenity to safety while he and Zoë investigate. What they find turns the whole story of Kerry upside-down. Revolution is brewing, and each of them will have to decide where to make their stand, even if it lands them on opposite sides …