This is a short novella. Jake and Cael are on the trail of a demon where a rash of suspicious deaths has broken out. When one brother is affected, can the other take out the source before it's too late?

Excerpt: She found him sprawled face down in the dirt. "Jake!" She ran, sliding to her knees beside him. "Jake!" Kiene jostled the back of his shoulder, but he didn't respond. Placing two fingers at his neck, she felt for a pulse while she scanned the area. Except for hers and Jake's tracks, there wasn't any sign that anything else was around. No disturbed foliage or broken limbs. Just the regular signs of birds and small rodents. Though nothing was in sight, the atmosphere here felt wrong, old and ancient, like something prowled just within the shadows. Jake's pulse beat steady and strong beneath her fingers.
What could have happened? "Come on, Jake, wake up. Cael!" she shouted for the young tracker. A whistle answered in reply.
"Jake." She nudged him again with the same unsatisfactory result. "Geez, you're stubborn even when you're unconscious."