High Quality Content by WIKIPEDIA articles! The Butterfly Clues is a young adult mystery novel written by Kate Ellison and published in February 2012 by Egmont USA. The Butterfly Clues tells the story of Penelope "Lo" Marin, an outcast teenage girl who struggles with Obsessive—compulsive disorder (OCD) and has to deal with the constant urge to steal various items, the frequent relocation due to her father`s job, and the memory of her brother Oren`s death. Throughout the novel, Lo`s problems arise as both weaknesses and strengths, which she is forced to deal with as she attempts to solve the murder of a young stripper.