Books like Burn on sweet fire by Sandra DuBay

When an Iowa farm girl swaps identities with a wealthy socialite, she is thrust into a Rome heist, a daring escape and an unexpected romance with a muscular hero who falls short of expectations.

SHE LONGED TO LOVE HIM Told all her life that she was plain, 20 year old Lydia Chadwick knew no man would come courting because of her looks. So it was with some suspicion that the shy, sweet San Francisco heiress woke one morning with a tall, dark, dangerously handsome husband she couldn't recall marrying. Lydia had lost her memory, and was desperate to discover if there was truly a love to remember. For as she looked at 31 year old Nathan Hunter's lean, muscular frame, she longed to abandon herself to the sensual stranger, and believe--if only for a little while--that the possessive passion in his smoky gray eyes was really for her. HE ACHED TO HAVE HER Business and pleasure weren't supposed to mix, but in this case Nathan Hunter was willing to make an exception. After all, it was in his best interests to keep his new bride's mind off the secrets of her past. Making sure she didn't remember her hatred for him turned out to be the easy part, as he initiated the innocent Lydia to womanhood. Not so easy was keeping sight of his own goals as Lydia's sweet surrender wove a seductive spell around Nathan's heart, arousing emotions he had thought forever buried....

A Vance Memorial Hospital blaze leaves staff injured and a friendly firefighter, Lucia Vance, under investigation. Amid drama, a wildfire expert named Raphael Wright offers help—and sparks a romance—while the real arsonist’s motive remains unclear.

After a shipwreck and pirate kidnapping, orphan sisters Tansy and Amanda are rescued by British spy Martin Ballard; Tansy’s affection sparks jealousy in Amanda, who tries to seduce him despite her imminent marriage.