Rise and Fall — A.L. Kessler

Abigail has spent the last two and a half months training with Samuel and Hannah while trying to balance her life outside the vampire world. When a dead body with a mysterious rune shows up, Abigail prepares to face down an old case. But the clues don't exactly match up, and Abigail and Liz follow the twists and turns that await them.When something cuts Samuel's training short, Oliver disappears, and the situations creates new demands. Abigail faces the vampire world and everything it holds once again. When the time comes, can she do what needs to be done?