The Dragon Kings Book Six

Isa is a dragon shifter queen who has never seen her scales.
She wants to, but a spell laid on her castle thousands of years ago, traps her inside. If she even thinks about breaking the rules, she'll die...
Liam is tired of living under the shadow of his father, Obsidian—king over all the American dragons. He constantly fights to prove himself.
When dragons from Europe come with stories of an evil queen who rules a hidden dragon kingdom with an iron fist, he knows he's found his mission.
Now he just has to survive... Isa and Liam's worlds collide and while each is bent on killing the other, they might just need to band together to a fight a threat that would kill them all.