The Serpent’s Coil by Elizabeth Silver

New Mexico Territory. 1868.

Marcus Rivers knows something is very wrong with the magic around Ruby Gulch. He’s kept his suspicions to himself, but his investigations have gone nowhere. And after months of living rough and fruitless searches, he’s on the verge of giving up. Then the mine owner’s son comes home.
Freshly graduated from the San Francisco University of Magic, William Dolan returns to find the town on edge. Even the land thrums with tension. When he meets Marcus and together they stumble onto the secrets of the mine, Will is going to have decide if he’s able to defy his father. If he’s strong enough to go for what, and who, he knows what’s right.
The differences between the two men are as wide as the desert. Wealth, race, status – despite all this, fate keeps throwing them together again and again. They’re going to have to work together if they’re going to save countless lives. The hard part, however, is going to be figuring out what to do with their hearts if the ruby dust ever settles.