Serenity - Those Left Behind Comic Book Collection*
Serenity Role Playing Game (RPG) by Jamie Chambers
All Sources
* Denotes Canon source: Canon sources means everything Joss Whedon was directly involved in creating, such as the Firefly TV episodes and/or Serenity movie, the Special Features sections of the DVDs, and the comic books. Non-canon sources means other related products such as the Role Playing Game, novelization, etc.