Books like Emerald Mistress by Lynne Graham

A Regency romance about Emily Wyndham, who adopts a new name and works as a lady's maid to escape her mother's scandal, only to be pursued by the powerful Duke of Wrotherham whose love threatens both of them.

Convenient Bride for the King is a romance novel by Kelly Hunter that explores themes of love, duty, and destiny within a fictional setting.

Nancy Drew investigates the mystery at Sugar Moon plantation, following intruder clues and a faded love letter to uncover a long‑lost pirate’s emerald necklace.

Eloise Kelly, a graduate student in nineteenth‑century England and France, spies on the deadly Pink Carnation and Black Tulip, unleashing secrets that reshape history and ignite a thrilling romance with Colin Selwick.

On the Irish Isle of Valentia wisps of cloud hang low in the air, and a rugged figure appears through the hazy mist--the man that Keelin O'Donnell has been searching for without ever realizing it. Garrett Kincaid can help beautiful stranger Keelin unlock the secrets of her past. But he can't give her his heart--he knows Keelin's life lies elsewhere. Except the essence of the Emerald Isle is capturing Keelin, drawing her in and giving her the courage to claim a future. A future that belongs to this man.

A widow uncovers a murder mystery in a Scottish castle while falling for a charismatic widower, and must confront her doubts to find a missing emerald.

A romance novel where Lady Imogen steals a necklace, and her wealthy suitor George Beame, heir to Oakfort, seeks to reclaim it with determination.

In 1880s Peru, a daring Californian woman protects her professor father while their quest for the lost Incan city of Vilcapampa tests love and survival in the jungle.

Kathy Broderick gazed at the Dallas sky, but there wasn't a hint of snow in it. Then her bike hit the open door of a sleek limousine, and she fell into the lap of an outrageously sexy man! Paul Garth insisted on taking her to the hospital and replacing her mangled bike, though stubborn, independent Kathy kept saying no. Paul refused to listen to her proud protests - as long as he was trying to help out, he'd be sharing close quarters with the fiery redhead who made him want to be a hero in her dazzling eyes. When his lips finally seized hers, he tasted like everything she'd ever hungered for, but Kathy knew she was way out of her league. Men like Paul didn't fall for impoverished shop owners, yet Paul insisted she made him happy. Kathy had dreamed of someone to watch over her, but Paul's dark secrets shadowed the joy they'd found. Could she teach him that love was the true Christmas miracle, the star that lit up their sky?