Forged by Flames: Book 3 (Dragon's Breath Series)

Ever since dragons invaded Earth, Bailey Monzac and other survivors have had to adjust to a new world order. But a long-lost threat is re-emerging that could once again destroy everything they've been struggling to rebuild—for both man and beast. There's an artifact out there that can control dragons, and many would seek to possess it for ill intent.
It's going to be up to Bailey, her dragon shape-shifter ally Aidan, and their friends to embark on a long and arduous quest to recover the relic before it falls into the wrong hands. Along the way, relationships will strengthen and the bonds of friendship will be tested. For there can only be one outcome if they wish to survive the journey.