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.

Can our robot descendants avoid repeating the mistakes of humanity?

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.