Blazing Blunderbuss by Nix Whittaker
Hara has not had an easy life. Dragged around the world by her con man of a father and forced to dress as a boy to keep her safe. She has finally gotten away from him when she walks into trouble. Gideon is a mathematician but that isn’t the only thing. He has been kidnapped by revolutionaries and they are about to be in a lot of trouble because they don’t know he is also a dragon. When Hara rescues Gideon she knows he is going to be trouble. Things get complicated when they accidentally steal a pirate ship and are dragged into a plot to start a war with the Wyvern Empire.