Stranded with the Secret Billionaire (Harlequin Romance)

Rescued by a brooding stranger… 

Jilted heiress Penny Hindmarsh-Firth sets her broken heart on escaping high-society city life. Instead, she's trapped by floods in the Outback and a handsome stranger on horseback comes to her rescue! 

After a betrayal shattered his life, Matt Fraser withdrew from the world—but he can't deny Penny a refuge. The secret billionaire is reluctantly intrigued as the society princess starts proving there's more to her than meets the eye…