David M. Booher 
All-New Firefly #3 [PDF ebook] 

Following the events at the monastery, Jayne is held hostage by the mysterious and dangerous criminal known only as the Tax Collector. Mal and Kaylee try to negotiate a trade and it goes about as well as expected from the crew of the Serenity. But they have a plan! And with a little (or a lot) of luck, they might just be able to rescue Jayne and deliver the medical supplies stolen by the Tax Collector’s gang.