High Quality Content by WIKIPEDIA articles! The Unseen trilogy consists of three books authored by Nancy Holder and Jeff Mariotte.Salma de la Navidad, a friend of Willow's, is having problems: her brother Nicky has disappeared and is believed to be joining a local Sunnydale gang called the Latin Cobras. Salma's also got a black shadowy nothingness that Buffy can sense but can barely fight. Meanwhile in LA, Angel is tied down by a case where his client is wrongfully accused of murder by crooked cops while Cordelia discovers a pack of pre-teens who revere vampires and have been promised eternal life by a vampire. Buffy's work takes her to LA along with Willow to the de la Navidad household where the same black shadow continues to attack Salma. When Salma suddenly disappears as does Kayley (one of the vampire lovers) everyone knows that something is up. After an explosion of oil fields, caused by Nicky, in Sunnydale, Riley rushes to LA where himself, Buffy and Angel have to work together to solve the disappearances and to calm down the gang warfare going on in LA.