Serenity Those Left Behind

In a universe filled with hearts and minds as cold and dark as the reaches of space, one small Firefly-class starship named Serenity takes its ragtag crew of mercenaries, outlaws, and fugitives in search of a job, any job, that'll earn them enough cash to afford that most elusive commodity--peace. This book takes place after the end of the time covered in Firefly and before Serenity.