The Unseen Trilogy Series by Nancy Holder, Jeffrey J. Mariotte

Shadows and SecretsIt's summertime in Sunnydale, and Salma de la Navidad, a friend of Buffy's from Sunnydale High, needs help. She and her family immigrated to America, and now she fears her brother, in an attempt to gain social acceptance, has stumbled into supernatural gang warfare. To make matters worse, an unknown creature has been doing a little night stalking. Buffy is certain that this new demonic presence has its roots in L.A. - Angel's turf... moreShadows and SecretsIt's summertime in Sunnydale, and Salma de la Navidad, a friend of Buffy's from Sunnydale High, needs help. She and her family immigrated to America, and now she fears her brother, in an attempt to gain social acceptance, has stumbled into supernatural gang warfare. To make matters worse, an unknown creature has been doing a little night stalking. Buffy is certain that this new demonic presence has its roots in L.A. - Angel's turf. So with the help of the Slayerettes, she heads off to battle demons - both actual and personal.Meanwhile, in the City of Angels, Cordelia stumbles upon a vampire-worshiping cult of runaways as Angel investigates an invisible presence wreaking havoc in the local prisons.Now Buffy and pals must deal with identity crises of their own. Buffy may be the Chosen One, but she is, ultimately, expendable. Angel is unique, yet his particular status isolates him from humanity and monsters alike. So while all wonder - "do I make a difference?" - the humans and demons who surround them answer that question in astonishing ways... less

Part two of the three-volume crossover series featuring Buffy and Angel. In Los Angeles, the pair compare notes and realise that both are dealing with cases of missing teenagers, most of them children of rich and powerful parents. Coincidence? Or is there something more sinister at work?

Dark UniverseBuffy and Angel find themselves launched into a frightening reality where fierce dragons and other fairy-tale monstrosities rule supreme. Once they locate each other, they rally the missing teens - including Salma - and attempt to make their way through the interdimensional portal back to Sunnydale. Little do they know that two unlikely allies have also come through to alternity: Spike and the rogue Slayer, Faith, both with their own respective - and complicated - MOs.Back in L.A... moreDark UniverseBuffy and Angel find themselves launched into a frightening reality where fierce dragons and other fairy-tale monstrosities rule supreme. Once they locate each other, they rally the missing teens - including Salma - and attempt to make their way through the interdimensional portal back to Sunnydale. Little do they know that two unlikely allies have also come through to alternity: Spike and the rogue Slayer, Faith, both with their own respective - and complicated - MOs.Back in L.A., gang violence and vigilantism are at a fever pitch. The Slayerettes - now an extended unit - are holding down the fort, awaiting Buffy and Angel's return. But Slayer and Vampire are feeling moral conflict that rivals the physical strain of demon-slaying: each wonders if a reality exists where their love could have survived. And when one of the duo's charges is suddenly killed, the portal to Sunnydale is sealed. Now, before they can worry about ridding their own universe of supernatural chaos, they've got to find a way to get back to it... less