AfterBurn, Reclaiming the Throne

Following The BirthRight Trilogy, comes AfterBurn - Reclaiming the Throne
When a spell bridged the gap between our world and another, four women from Earth woke under a new sky. Thrust into an ancient war of good versus evil, Catherine, Kassandra, Sian, and Laura discovered that life as they'd known it was a lie. Now, returning victorious from a battle of insurmountable odds, the four women have a chance to begin their lives anew on this world of sword and sorcery.
But a dark secret haunts one of their inner circle. A secret that could ruin it all...