Red Captive by Charlene Hartnady

The dragons on Mistveil Island are not your run-of-the-mill kind. They’re something else entirely…
I am stolen away in the middle of the night by a bunch of thugs. It’s clear to me that they are shifters. Their tattoos have the telltale red which makes my blood run cold.
Reds!
One thing is for sure, I’m in a world of trouble. I end up on Mistveil Island, where they discover that they kidnapped the wrong person. I’m so relieved. Surely, they’ll let me go back to Draig, or better yet, they’ll let me go home to the Mainland.
It doesn’t happen. They’re not letting me go. It turns out that women are scarce on this island. They’re keeping me. There’s talk of what they have planned, and it terrifies me.