The Lost Adventures is an anthology of comics relating to Avatar: The Last Airbender and depicting events unseen during the series' run. The anthology collects previously unpublished comics, minicomics included as part of the Book Two: Earth and Book Three: Fire DVD volumes, the Avatar comic from Free Comic Book Day 2011, and the numerous works released by Nickelodeon Magazine and Nickelodeon Comics Club from 2005 through 2009.