Fated Mates by Addison Carmichael

She’s a time traveler from the present. He’s a werewolf in the wild west. Both are hunted by a common enemy.

Is it Fate that brings them together? Or is it cruelly taunting them once again?
Historian Callista McEwan is contracted by the Snoqualmie tribe in Washington State to authenticate recently discovered ancient hieroglyphs. But a mysterious cave throws her a century into the past to the old west. There in 1888 Callista meets a mountain man that has secrets of his own, one whom she is more than just physically drawn to, but is destined to help him fight a great evil that threatens to destroy those he cares for.
Frontiersman and werewolf, Michael Bryant plans to move his new wolf pack into the wild Pacific Northwest mountains, the perfect place for his new community to grow and flourish. But the ancient enemy of all were-kind shifters has discovered Mike Bryant’s presence and his plans, and threatens to stop him at any cost.
Caught in the middle of a war she never counted on, Callista battles her own dilemma of needing to return to her own 20th century world, or staying in the old west to live with the man she has grown to love.
But choose she must, before the choice itself it taken from her.