Afterlife (Evernight, Book 4)

Destiny awaits Bianca and Lucas . . .
Bianca and Lucas have always believed they could endure anything to be together. When a twist of fate not only transforms Bianca into a wraith but also turns Lucas into a vampire—the very creature he spent his life hunting—they are left reeling.
Haunted by his powerful need to kill, Lucas can turn to only one place for help … Evernight Academy. Bianca is determined to remain with him. But with the vampire leader of Evernight waging a war against wraiths, her former home has become the most dangerous place she could be, despite the new powers her ghostly transformation has given her.
A battle between wraiths and vampires looms, and Bianca and Lucas face a terrifying new reality. They've overcome every obstacle life has thrown at them, but is their love strong enough to survive the challenges after life?