Alien Prince’s Fake Bride by Calista Skye

A forced vow, a forbidden power, and a throne on the brink of collapse.

Umbra joined Earth’s fledgling Space Force to find her sister, stolen by aliens years ago.
But her very first mission ends in her own abduction—at the hands of Mareliux, the towering, dark-blue crown prince of the Khavgren Empire.

With a galactic throne to claim and a ruthless ultimatum from his father—marry or forfeit his crown—Mareliux can’t afford distractions. Burned by love once before, he swore never to risk his heart again. Yet Umbra’s defiance and fire draw him like no other, and instead of letting her go, he coerces her into a dangerous sham marriage.
Whisked to the glittering planet of Khav, Umbra is thrust into a world where Syntrix, a mystical cosmic force, fuels both power and peril. At the empire’s borders, the vicious Vyrpy close in. At the court’s heart, treachery coils tighter around the immensely powerful Tentacle Throne. And in Mareliux’s arms, Umbra feels a wildfire she cannot resist.

When Umbra discovers her own rare ability to wield Syntrix, she becomes the empire’s greatest weapon—and Mareliux’s greatest temptation. Their fake marriage is spiraling into something all too real, where desire and duty collide.
But as betrayal strikes from within and the sham threatens to be exposed, saving the empire may demand the one thing neither of them wanted: a true bond. And the fate of Earth itself, as well as Umbra’s lost sister, may hang on whether Umbra and Mareliux surrender to the fire between them—or let it consume them both.

Alien Prince’s Fake Bride is a steamy science-fiction romantasy, featuring a powerful alien royal who’s used to getting his way and a feisty space pilot from Earth who has vital goals of her own.