The Star Prince (Star #2)

Earth guy Ian Hamilton studying for a finance degree when his mother marries the king of the galaxy. But when his stepfather unexpectedly chooses him as his successor, the new crown prince, Ian is thrust into a world he never envisioned, complicated by a court-load of scheming royals who don't think he belongs there, either. And if that’s not enough, an independent-minded princess-in-peril lands in his arms, on the run from the very laws he’s pledged to uphold.
Outmanned and outgunned, he’s a fish out of water. Only allowing himself to be overwhelmed is not an option. It seems that the entire kingdom is hurtling toward war, and he’s the only one who can stop it. Rated '4/5 - Explicit open door' for steam/spice/heat level.