There are 3 books in the The Secret Life of Mary Bennet series. The newest book is The Lady's Guide to Death and Deception which came out in 2022.

1
The Secret Life of Miss Mary Bennet

Book cover of The Secret Life of Miss Mary Bennet
A 2022 MARY HIGGINS CLARK AWARD NOMINEE

In Jane Austen’s revered Pride and Prejudice, Mary, the middle sister, is often passed over. Until now…

Upon the death of her father, Mary Bennet’s life is thrown into turmoil. With no fortune or marriage prospects, Mary must rely on the kindness of…
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2
The True Confessions of a London Spy

Book cover of The True Confessions of a London Spy
No one said being a spy for the British government would be easy.

When Miss Mary Bennet is assigned to London for the Season, extravagant balls and eligible men are the least of her worries. A government messenger has been murdered and suspicion falls on the Radicals, who may be…

3
The Lady's Guide to Death and Deception

Book cover of The Lady's Guide to Death and Deception
What is a spy willing to do when both her heart and her country are at risk?

Life changes once again for British spy Miss Mary Bennet when Napoleon Bonaparte escapes from the Isle of Elba. Mary quickly departs England for Brussels, the city where the Allied forces prepare for…