Dark Rift (The Gray Tower Trilogy, #2)
by Alesha Escobar
In a World War II where Nazi warlocks battle with Gray Tower wizards in the streets of Europe and in the shadows, the Gray Tower issues an order: Kill the Time Wizard known as the Drifter. Tower-trained alchemist, Isabella, can't go through with it, because it hits too close to home. And, if she doesn't choose the right allies, the Time Wizard may fall into far more sinister hands.