The fae are real...
Gil and his sister escaped their spaceship with two goals: save her from murdering lords, and forge an alliance with Earth before the same lords try to conquer it. The fae have magic, while Earth has tech and greater numbers. But in a battle, which would win?

And they are here...
Alexandria and her family are fleeing her parents' toxic divorce, seeking peace and safety. But when they accidentally make first contact with the refugees, their troubles suddenly become global. If they can't make a treaty, the fae will attack Earth, and both sides might die
But Earth doesn't even believe in the fae...

Contemporary YA fantasy with a dash of sci fi & mythology, from the author of Unexpected Heroes.