The Reasons for Marriage
First published by Harlequin in 1995
This work remains under license to Harlequin, and goes in and out of print, or even e-book availability, but is frequently re-published or reissued in various forms, through various avenues, in various markets, at various times. Please note you may come across a publication that combines two or more of the original books, within the same volume, under a different title, or even combines one of Stephanie's books with works of other authors in a combined volume - again often with a different title.
The jacket blurb from the original UK edition:
"Miss Lenore Lester was perfectly content with her quiet country life and had no desire for marriage. She took steps to remain inconspicuous when managing her brothers' houseparties, and tried her best to show indifference - but to no avail. The notoriously charming Duke of Eversleigh had found her out and was quite persistent in his affections."
Check your favorite on-line stores for print or e-book reissues.