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Also by Jess Armstrong:

The Devil in Oxford, August 2026
Trade Paperback
The Devil in Oxford, November 2025
Hardcover / e-Book
The Secret of the Three Fates, December 2024
Hardcover / e-Book
The Curse of Penryth Hall, December 2023
Hardcover / e-Book

THE DEVIL IN OXFORD
By: Jess Armstrong

Ruby Vaughn Mystery #3
St. Martin’s Press
November 2025
On Sale: November 4, 2025
336 pages
ISBN: 1250374650
EAN: 9781250374653
Kindle: B0DPTWZT3J
Hardcover / e-Book
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Romance Historical

Jess Armstrong’s USA Today bestselling and award-winning series is historical gothic murder mystery at its best, and Ruby Vaughn returns in The Devil in Oxford.

If someone were to ask American heiress Ruby Vaughn how exactly the occult came to play such a large role in her life, she would immediately point to her octogenarian housemate and employer, Mr. Owen. Together, the pair run a rare book shop in Exeter. Mr. Owen’s penchant for arcane, unusual—and occasionally illegal—books has been known to get Ruby into her fair share of trouble. And after the last year, she is looking forward to spending a quiet holiday in picturesque Oxford while Mr. Owen attends the annual meeting of his antiquarian society. Secretly, Ruby is also looking for a holiday from her confounding feelings for Ruan Kivell, the intriguing folk healer Pellar that she met in Cornwall.

When Mr. Owen secures two tickets to an upcoming exhibition of artifacts amassed by disgraced scholar Julius Harker, Ruby reluctantly agrees to attend. The evening turns out to be more eventful than either of them bargained for. Harker’s dead body is discovered amongst the collection, his business partner is hastily arrested, and Ruan arrives…wanting to speak with Ruby. It seems both the arcane and her Pellar have followed Ruby to Oxford.

The murder case is suspicious at best, but the last thing Ruby wants is another investigation. That is, until an old friend comes begging for Ruby’s help. It soon becomes painfully clear that there is more going on in Oxford than meets the eye. Ruby and Ruan will have to uncover the dark secrets of the competitive world of antiquities while trying to understand the peculiar force that keeps drawing them back together.