David M. Booher 
All-New Firefly: The Gospel According to Jayne Vol. 1 [PDF ebook] 

After their adventures on The Earth That Was, the crew of the Serenity are reunited under the leadership of Captain Kaylee. Unfortunately with food, credits, and morale low, the crew takes on a heist which proves too much for their moral code and quickly turns into a recovery mission. And it’s not long before their current dilemma puts Captain Kaylee, Mal, Zoe, Simon, River, Leonard, and Emma on a collision course with the mysterious past of the crew member who dragged them into this mess in the first place. That’s right, the Hero of Canton himself, one Jayne Cobb. Rising star writer David M. Booher (Canto) and artist Jordi Perez (Queen of Bad Dreams) set course for an all-new era that charts the future of the Serenity while delving into the previous unrevealed secret past of one of the most enigmatic characters in the beloved and bestselling Firefly franchise. Collects All-New Firefly #1-4.