“They had a responsibility as Dragon Kings, a duty that no other could fulfill. An obligation caused by one of their own so very long ago."
The Dark King series by Donna Grant, has its origins a millennium ago, when dragons ruled over all the other creatures. The leaders—men who shifted into dragons—were powerful, magical and immortal, and became known as the Dragon Kings. When the humans appeared, the Kings' job was to protect them and keep peace between both human and dragon race. Everything fell apart when a human woman who had vowed to love a Dragon King betrayed them all. The Dragon Kings had to conceal the dragon race from the human realm and placed a spell to protect any Dragon King from falling in love with a human again.
Eons later, a new evil lurks to disturb the peace the Dragon Kings have worked so hard to attain, pulling them into a war they don’t want. To make matters worse, the magic placed on the Dragon Kings is failing. One by one, the Dragon Kings are falling in love with the same race that had betrayed them all those years ago.
In the first Dark King book, Dark Craving, Hal has found his mate with the human, Cassie Hunter. The magic that was supposed to make him immune to human affection isn't working: “He wanted Cassie with an unmovable, unyielding tenacity.”