Blood Charged - Lindsay Buroker

Blood Charged is the third novel in the Dragon Blood series.

Sardelle and Zirkander take a team into Cofah to find the source of the rumors that the Cofah have dragon blood. They find the dragon blood. It's used in weapons and machines the Cofah try and stop them with. Very effectively too. The question is, where did the Cofah get dragon blood? These are "lose sleep" books. They make staying up late worth it. Very highly recommended.