Year One by Nora Roberts (Bppk 1:The Chronicles of The One trilogy)

A mysterious pandemic known as The Doom wipes out most of the world's population within weeks. As governments fall and societies collapse, something ancient and magical awakens. Survivors begin to discover new powers—some use them for good, others for chaos.

Among them is Lana Bingham, a witch who escapes devastated New York City with her lover, Max, hoping to build a new life and protect the child she's carrying—a child prophesied to be "The One," destined to bring either salvation or destruction.

Their journey brings them into contact with other survivors—some gifted, some dangerous—as they seek safety, meaning, and a place to rebuild a fractured world.