Inspired by the true story of Countess Bessborough, Rules of the Heart is a sweeping historical novel from Janice Hadlow, the bestselling author of The Other Bennet Sister. Set in 1794 England, this story immerses readers in the fashionable circles of the aristocracy as Lady Harriet Bessborough navigates a marriage lacking true love and finds herself drawn into an intense, forbidden affair.

Praise for the Author:

• 'Entertaining historical fiction with Jane Austen vibes' – Good Housekeeping
• 'Immersive and engaging' – The Guardian
• 'A novel that will delight Pride and Prejudice fans' – Independent

Lady Harriet Bessborough appears to have everything: she is the wife of a lord and the sister of a duchess. However, she secretly yearns for genuine love. When she encounters the captivating Lord Granville, twelve years her junior, she resists his advances until she discovers a side of him she cannot ignore. As Harriet pursues this all-consuming affair, she is pulled between her societal duty and her deepest desires, leading her closer to scandal in a world obsessed with appearances.

• Historical Fiction set in England, 1794.
• Features a sweeping romance inspired by the true story of Countess Bessborough.
• From the bestselling author Janice Hadlow.
• Paperback edition with a print length of 480 pages.

• Author: Janice Hadlow
• Binding: Paperback
• Language: English
• Print Length: 480 pages
• Publication Date: June 4, 2026
• ISBN-13: 978-1509841998
• Dimensions: 13.2 x 2.9 x 19.8 cm
• Weight: 320 g
• Reading Age: 18 years and up

Dive into this compelling tale of duty, desire, and the high stakes of love in Georgian society.