The Royally Broke Billionaire by Ann Omasta

Her brothers are prominent billionaires, and his kingdom is in financial trouble. She wants him. He needs her, but he loves her best friend.
Will their secrets leave them all royally blue?

Tess Donovan is a smart, classy, opinionated, and independent woman. She has always dreamed of marrying a handsome prince, and suddenly that lifelong wish is within reach.
Prince Pierce Huntington Astor III is about to take the throne of the kingdom he loves. His father’s gambling addiction has depleted the once-extravagant riches of their lush island paradise, leaving his son with a royal mess.
Tess expects the prince to sweep her off her feet. Imagine her surprise when he instead falls for her loud, klutzy, and decidedly un-royal best friend, Mo.
Prince Pierce knows Tess is the woman that can save his beloved kingdom, but his heart wants ill-suited Mo. Mo adores the prince, but she’s a tomboy at heart, so she’s not keen on the royal rules and strict expectations that go along with being his bride.

These three are royally at odds. Can they all get what they want? Or will their secrets ruin everything?