Ravished By Magic by E. M. Moore

Magic…a simple gift, or a tool to barter power?

The coven is hard at work helping Liam with his slight demonic problem when the pull once again interrupts things, taking them straight to a house with a drained witch. One-by-one, more Salem witches are found depleted, the one thing they cherish most only a flicker inside them.
With Liam succumbing to the evil more everyday, the coven’s resources are stretched thin. They reach out for help in the unlikeliest places, promising a favor they’re not sure they can keep to someone they shouldn’t even be associating with. However, they’d do anything to save one of their own, even if they suspect he’s falling into the black hole of bad magic.

The coven must hurry to find answers if they want to save Liam, and the other witches, before they all give in to the evil infiltrating Salem.