The Three Mirrors, A King Rides Through, Volume 1, Book One
On a wild, unusually tempestuous night, three young adults, Leitha Windsor (19), her sister Hailjan Windsor (17), and their live-in cousin, Ethan St Clair (17), through a series of weird incidents trace their family origins and find a hidden room containing an ancient mirror in their ancestral family home, Amharoch Manor.
Attached to the mirror is a letter from Garthaume, Grand Wizard of the Land, informing them their father is a King, and they are of Royal descent, and how to translate to Amharoch, their ancestral Land, a country under the spell of an evil queen, fighting for the soul of its people and the good of the Land.
Taking up the challenge the three use the mirror, but things go badly wrong. Instead of being translated to Garthaume’s Keep, they are split and deposited in opposite sides of the vast country.