Wings of Frost by JD Monroe

A disgraced dragon warrior.
As one of the mighty warriors who turned the tide of the Great War, Velati Rimewing is a legend among dragon shifters. Centuries of loyal service ended in banishment when he defied his queen. When he is called back into the fold to fight a dragon-hating cult, he’ll do anything to get answers and redeem his honor.

A true believer with unspeakable power.
Initiated into the Chosen as one of their secret weapons, Marlena Nightrunner has a divine calling. By ending the tyranny of dragons, she will secure the future for humanity across two worlds. But when she loses a bloody fight and wakes up in a dragon prison, her charismatic captor offers an impossible choice: betray her people to help the dragons or die.

She’ll have to betray her people to save his.
With his reputation already in tatters, Velati risks everything to bring Marlena back into the light. As he pulls back the veil on the bloody secrets of the Chosen, her sworn enemy becomes her salvation. But his growing devotion may be too little to save her. The Chosen don’t take kindly to losing their weapon, and they’ll destroy anyone who stands in their way of reclaiming her.