Ghosted - Nikki Ashburne, #1

After former party girl Nikki Ashburne accidentally overdoses and briefly dies, she wakes up able to see ghosts. A good thing, because she lost all her other friends in the process. Now she runs ghosts tours of Los Angeles with her spirit-friends' help. So when someone starts exorcising the ghosts of Hollywood, Nikki scrambles to find the perpetrator before her livelihood-and her only friends-vanish forever.
Come for the ghosts. Stay for the snark. Just keep your mitts off Nikki's friends.