Amethyst (Mystic Stones Series #3‪)‬

Contrary to popular belief, Psytech didn't take over the world in a day. Decades of planning, searching and manipulation were needed to pull off the largest technology takedown to ever overcome the earth.

As Psytech closes in on the key to their world domination attempts, a quiet bank teller becomes trapped in the middle of an ancient feud between witches and vampires. Disa is the only one with the knowledge to unlock the Amethyst Idol, an old witch artifact enchanted within an amethyst geode.

Taken hostage and held in a well-guarded mansion, Disa must find a way to break the ancient code her ancestors imposed on the Amethyst Idol. She's promised her freedom if she can do it, but something tells her the vampires around her can't be trusted.

The only solace she finds within the cold, white walls is the man who captured her, but his kindness seems to be a trick. He is, after all, the adopted son of the Vampire Emperor and therefore holds the title: Prince of the Vampire Empire.