A Breath Of Frost Lovegrove Legacy Series, Book 1.

In 1814, three cousins-Gretchen, Emma, and Penelope-discover their family lineage of witchcraft when a binding spell is broken, allowing their individual magical powers to manifest. Now, beyond the manicured gardens and ballrooms of Regency London, an alluring underworld available only to those with power is revealed to the cousins. By claiming their power, the three cousins have accidentally opened the gates to the underworld. Now ghouls, hellho...