Obsidian is a series of short stories by Anika Moore. Each book features three short stories. The series starts with this book "Obsidian; Yuna's story" with three stories about a strange young girl named Yuna. Devil at the Gate; The Peterson family is thrown into darkness and turmoil once more with Yuna at the heart of the strange happenings. Her dark side is out once again, vowing revenge on those who have caused her pain. The Root of all Evil; The beginning of the end for Yuna. Travel back to find out how the darkness came into the Peterson Household. Love, betrayal and pain tear the family...