Dragon's Blood - Cruentus Dragons, #1

For centuries, there have been legends of Vampires-the fault of one careless dragon. But humans only know part of the story. Walking amongst us are Dragons-Shape-shifters who feed on blood. Scarlett couldn't help staring. He was the most captivating man she'd ever seen. Alluring. Mesmerizing. And then he turned crazy. Mr. Tall, Dark and Panty-melting kidnapped her off the subway! She was already on the run, but now, his wild claims of dragons and destiny and people who want to kill her ring all too true.
She's caught in the middle of a war she knew nothing about.  Worse, he claims she's a Dragon's Mate. Whatever that is. Scarlett just wants out. But as the battle rages on, she needs even more. And that more is: Janos Aventech, Dragon elder and leader of the Cruentus Dragons.