Alpha Alpha Gamma (The Literary World of Nancy Springer)

Kerri Ellen lives each day with the haunting memory of the day her sister Kimmi disappeared on her way to work. Every night, she lights a candle in the hopes that her lost sister will somehow, miraculously, find her way home. When fellow college student Burke's little sister goes missing, Kerri teams up with her sorority sisters to help comb the area to try to find her. As she makes her way through the woods and eventually back to Burke's house, all she can hope for is an outcome that's better than the one she's anticipating for her own sibling. When the investigation takes an odd turn, Kerri soon realizes there are some mysteries in life where finding the solution doesn't necessarily mean closure.