The Black Bird Oracle

By Deborah Harkness
All Souls series Bk 5 
 
The first shadows fall on a Friday afternoon when a single, dying raven lands on the pavement in front of Diana Bishop, harbinger of an invitation that reads, ''It's time you came home, Diana''.
 
Diana is a witch and scholar; her husband Matthew Clairmont, a vampire. Their intense love for one another awoke the dark powers within her and dissolved the Covenant between the three species - Witch, Daemon and Vampire - that live alongside humans. Now, the governing Congregation has decided it must test the magical powers of their seven-year-old twins, Pip and Becca. Concerned with their safety, Diana decides to forge a different path for her family's future and travels to Ravenswood, the Proctor family home.
 
There, Diana begins a new era, becoming her great aunt Gwyneth's pupil in higher magic. It's time to confront her family's past - and her own, inescapable desire for greater power.