Hey, Brian K. Vaughan here with an exclusive excerpt for my friends at Boing Boing of the creator roundtable between artist Fiona Staples, letterer Fonografiks, and Image Comics publisher Eric Stephenson featured in the back of SAGA: BOOK ONE, a new hardcover collection of our first eighteen issues. As the writer, I have arguably the easiest job of any of my collaborators, but check out how much I whine and complain at the scripting stage of our twelve-step process…