The Frog Prince by Tracy Lauren

Madison was hardly more than a child when stolen from Earth—a fact that she resents to no end. Ripped away from all she ever knew, she’s reluctant to be the princess her family expects her to be. Tired of living out someone else’s happily ever after, Madison reaches her breaking point when kidnapped by another kingdom. She’s done with spaceships, done with otherworldly planets, and she sure as hell is done with aliens. She spent years dreaming of Earth, never daring to believe it to be anything more than a childish fantasy. But all that changes when a cocky guard comes to her rescue.
She strikes a deal with the green-skinned alien, and while it might not be a completely honest one, what does it matter when he holds the key to finally making all her dreams come true?
Kethian isn’t exactly honest himself. Intrigued by the aloof princess with a reputation for being spoiled and ungrateful, Kethian can’t help but make a deal at the expense of his kingdom. He tells himself it’s just another adventure, but that’s a lie not even he believes.
One last journey through space and Madison is home free. Will Earth be all she remembers, or will it pale in comparison to the bond she discovers in The Frog Prince?