Against the darkness
(Book)

"For generations, the Slayer was supposed to be the chosen, the one girl in all the world with the power to stand against the vampires, demons, and forces of darkness. When Willow used the scythe to call up all the potential slayers at once, it changed everything. For years, the slayers have been working and fighting together as a team. Then the Darkness came, killing many slayers and trapping the rest in an alternate dimension. And Frankie Rosenberg, the world’s first Slayer-Witch, found herself fighting evil alone. Sort of. After their latest confrontation with the Darkness, the Scooby gang is more fragmented than ever. Jake is having a werewolf identity crisis, and the return of his troublemaker brother Jordy is only making things worse. Hailey is off pretending to be one of the rogue slayers. Sigmund is burying his broken heart in books. And Frankie’s mom, Willow, and Watcher, Spike, only seem to care about bringing Buffy back. Now, Frankie must forge her own path, save the slayers, reunite her friends, and lead the charge to defeat the Darkness once and for all." --publisher's website.