The Atlantean Horse. Feathers of the Phoenix, #1

The day a stranger appears at Rosa's door in the middle of a blizzard, she knows one thing for sure:Her "normal" life is over. Seventeen-year-old Rosa has spent two years trying to escape the terrifying gift she inherited, the ability to hear voices from beyond. But this visitor doesn't come with ghost stories.He comes with a mission. Atlantis is rising. And Rosa has been chosen to help bring it back.
Within weeks, she and her cousin Jerome are whisked from the Denver suburbs to a remote Greek island where an eerie break-in, a sunken city beneath the sea, and a furious stone statue known as the Atlantean Horse reveal an impossible truth: their family is tied to Atlantis itself. To reunite a lost world, Rosa must recover the sacred Feathers of the Phoenix, before ruthless enemies reach them first.
Because once the hunt begins, there's no turning back."Thrilling and atmospheric, this Atlantis adventure hooks fast, blending ghosts, mystery, and nonstop danger beautifully. Highly recommended, " The International Review of Books.