Hearts Aflame is a classic historical romance novel written by bestselling author Johanna Lindsey and originally published in June 1987 by Avon Books. The book serves as the second installment in the popular Haardrad Viking Family Saga. Set in 9th-century Wessex, it tells the story of a fierce Viking maiden who is captured by a noble Saxon lord, combining themes of forced captivity, enemies-to-lovers, and deep-seated cultural divides.

Beautiful and defiant, Kristen Haardrad meets the hot, longing gaze of Royce, Thane of Wyndhurst, with icy fury - vowing never to be enslaved by the powerful Saxon lord who holds her captive.

She is his enemy and his prize - a wild and lusty hellion to be tamed by her dashing conqueror's kiss. But though maddened with desire for the golden-haired Viking temptress, noble Royce, in conscience, cannot force his exquisite prisoner to submit. For only Kristen's willing surrender can quench the blistering fires that sear his tormented soul - and heal a heart consumed by passion with a soothing balm of rapturous, unconditional love.