Now is the Time of Monsters by A.G. Mock

HER VISIONS PREDICT BRUTAL MURDERS.
ONE OF THEM IS HER OWN.

Since childhood, Cassie has been haunted by nightmares—she just never imagined they might be real. But when a killer known as "The Gemini" grips 1969 San Francisco in a sadistic reign of terror, Cassie’s dreams take on a chilling new meaning: They’re not just nightmares, but brutal visions of actual murders.

Afraid and isolated, newly separated young mother Cassie can somehow see the Gemini’s attacks before they happen.

But knowing the future doesn’t mean she can change it.

Even if one of the deaths she foresees is her own...