The Twins of Embrellon: Book Two of the Embrellon Series

Jason and Lantana, the twin son and daughter of James Whitlaw, Leader of the Guardians of Embrellon, become telepathically bonded in a symbiotic relationship with Shandarro and Braela, together with their father, they join the fight against the Marn, a barbaric race of beings who come to Embrellon to take captives. They discover ancient secrets, and develop new ways to fight the Marn. They are what stands between freedom and their way of life, and being conquered and taken as slaves