Dark Pursuit. Soul Storm, #2

Old blood and ancient power defy evil so dark, deep, and menacing it destroys everything in its path. Widespread rioting, plus shortages of fuel, food, and electricity lure demons across the veil to invade Earth. Drawn by anarchy, they're out of control, drunk on their own power, and growing stronger by the day. With her life crumbling around her, Lara McInnis is reluctantly roped into channeling her psychic talents to locate a missing teen.
Her lack of skill strands her in the murky underbelly of a world inhabited by dark forces. Trevor Denoble's Celtic blood yields unexpected gifts. After years of uncertainty, Lara is really and truly finally his, and he's determined to keep her by his side. No stranger to violence, more blood on his hands is a small price to pay to keep the woman he loves safe.