Earth is under attack. The onslaught came without warning, without reason. Admiral Sara Ramirez and the Earth Orbital Defense Force are all but overwhelmed. Can they pull it together and win this war? And if so, at what cost?

An ancient curse could mean ultimate power--but at what cost? Filled with magic and mystery, Rune of the Apprentice is an action-packed novel of adventure, love, and self-discovery.

Cora, one of the last Sentinels, remains the last line of defense against an unknown enemy laying siege to her planet. Together with a handful of allies, Cora must find a way to protect the one thing this enemy had come to destroy - the humans.