The fanboy in me insisted that I read the the first volume of the Heroes companion piece. Originally released as a series of 5-6 page web comics, these stories (and sometimes mini-arcs) fill in gaps between episodes and back stories to some of the characters. I think this is one for the completists only unfortunately - the brief nature of the stories mean that most are reliant on the narrative arc of the TV show for structure or meaning, and reading them consecutively in the graphic novel format doesn't really work. Haing said that, there are a few little gems that pop up from time to time, and one particular arc of 5 or 6 stories (probably the length of a normal comic book) set in the Vietnam war provides one of the more cohesive stories with a denouement that made me feel I'd had some value in my purchase - one of those "cool!" moments.