Fantasy book series that consists of five novels. It's about a brother-sister duo who both become either affiliated with the light side of magic or the dark side but remain a team. Its sequel series is Dragonwatch. Fandom is small but you can find it on many platforms, most notably Ao3 and Tumblr. The author is Brandon Mull. You can find fans of all ages, but it's marketed to a middle school to high school audience. Fandom is sometimes called "Fable Fam."

When you eat dirt for the first time and leave your family to build a shack in the woods