sentences:  An issue #0 was published in October 2005, and the ongoing series began in January 2006.For the first four years of its run, the series was marketed as various limited series for each story, in published order as "", "", "", "", "", "", "" and "".The series also had a sister title of ongoing one-shots entitled "" which began in September 2006, each focusing on a particular character and affecting the storyline of the main title.