Time of the Burning Mask — Deirdre Rowan

Kit is summoned to a vast Arizona ranch by Edwina, the grandmother who had disowned Kit's mother. Edwina rules her Yaqui workers with an iron hand and perhaps witchcraft. A union organizer comes in to change that during rising conflict that keeps time with the ancient Easter celebrations.

• I know your father died when you were small. So if he spoke of me, you would not remember it, and I know your mother, my only child, was glad to forget me. But you are my granddaughter and you affect a vital decision I cannot make till I know you better.
•
Thus did the imperious Edwina Thorne summon her spirited young granddaughter Kit to La Providencia, the huge old ranch estate in Arizona.

Kit's only apprehension was in meeting the stranger who was her grandmother. She did not know of the other things that lay in wait for her. Violent things. Frightening things.

She had not even reached the ranch when there was an attempt on her life. She could not understand it. Why would anyone want to harm her?

She did not know then how many hated her tyrannical grandmother. For Edwina's ruled La Providencia and the native Yaquis with an iron hand.

Now Kit unknowingly had become the key to a desperate and terrifying plan of vengeance.