Heart of Enquiry Books in Order
Below you'll find the complete list of Heart of Enquiry books in publication order. This is generally the recommended reading order for the series.
Reading order verified: January 2026
Publication Order
The Widow Vanishes
Buy on Amazon2014
The Duke Who Knew Too Much
Buy on Amazon2015
M is for Marquess
Buy on Amazon2015
The Lady Who Came in from the Cold
Buy on Amazon2015
The Viscount Always Knocks Twice
Buy on Amazon2016
Never Say Never to an Earl
Buy on Amazon2016
The Gentleman Who Loved Me
Buy on Amazon2017
Frequently Asked Questions
The recommended reading order for the Heart of Enquiry series is publication order: 1. The Widow Vanishes (2014), 2. The Duke Who Knew Too Much (2015), 3. M is for Marquess (2015), 4. The Lady Who Came in from the Cold (2015), 5. The Viscount Always Knocks Twice (2016), and 2 more. This is generally the best way to experience the story as the author intended.
The Heart of Enquiry series by Grace Callaway contains 7 books. The series began in 2014 and continues to be a popular choice for readers.
The Heart of Enquiry series is written by Grace Callaway. You can find more books and series by this author on our website.
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