Greg Pak 
Firefly #25 [PDF ebook] 

New Characters! New Enemies! A Brand New Era starts here! For the FIRST TIME EVER, it’s the most-demanded Firefly story ever, as the series jumps forward in time after the battle with the Reavers that left Wash & Book dead. Mal and the new crew of Serenity set a course for the EARTH THAT WAS! That’s right, fans will see what’s happened to Earth for the first time in Firefly history – and that means all the rules are going out the window, in ways even Mal can’t imagine… A Perfect Jumping-On Point For New Fans!