Imogen finds a love note tucked in a book.
She walks by the mansion she believes the book and note came from.
She's accosted but the grumpy billionaire, Seth.
and voilà - there's your "meet cute"

Or the actual blurb -
very pleasurable proposition!. Seth Broden needs this last deal to achieve the success he's always desired—but to close it, he must make the one acquisition he's never a wife! A chance meeting with pretty but penniless Imogen
Hayes gives Seth the chance to propose a mutually beneficial arrangement…
Jilted bride Imogen vowed to save herself for her wedding night—but she never expected to be walking down the aisle to Seth! With the brooding tycoon waiting for her at the altar, will Imogen succumb to his charm and be his wife in more than name only?