The Dragon Kings Book Nineteen - The Dragon Kings, #19

Ruby is tired of waiting. Now that she and Damon made up, it's more important than ever that she get rid of her dragon form before Damon manages to secure one. The sealing would connect her to the dragon world forever, and she needs a clean break. Sid has decided to go after the queen and worry about the babies afterward, so Ruby goes on her own. But from the moment she sets out on her journey, things start to go wrong.
In the end she is betrayed and her very life is on the line.