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Covenant of the Dead

A Historical Religious Murder Thriller of Spiritualism and Vengeance

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Pub Date 26 Mar 2026 | Archive Date 27 Mar 2026

Book Whisperer | Lascaux Media


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Description

Three nuns are murdered in the attic of a Boston convent. There are no witnesses. No shell casings. 

The only things missing are their rosaries.

Days later, a Boston medium claims her spirit guide has identified the killer: a broken priest with an antique revolver. A single newspaper column turns that claim into a city-wide witch hunt.

Harvard “pope whisperer” Cal Donovan and former Vatican power broker Elisabetta Celestino step into the city’s séance rooms to test the story.

What they uncover is a trail of antique ballistics, buried secrets, and a generations-old vendetta that reaches back to Arthur Conan Doyle and the birth of modern Spiritualism.

To save an innocent man, Cal and Elisabetta must decide whether they are chasing a brilliant fraud who hides behind the dead, or facing something far more unsettling: the dead really are answering back.

From international bestselling author Glenn Cooper, Covenant of the Dead is a standalone Cal Donovan thriller blending historical mystery, murder, and religious intrigue for readers of Dan Brown and Steve Berry.

Three nuns are murdered in the attic of a Boston convent. There are no witnesses. No shell casings. 

The only things missing are their rosaries.

Days later, a Boston medium claims her spirit guide has...


Available Editions

EDITION Ebook
ISBN 9781971648088
PRICE $7.99 (USD)
PAGES 306

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Average rating from 38 members


Featured Reviews

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A professor, a nun, Sherlock Holmes’s creator a two police detectives go to a séance — sounds like a joke is coming. But what we get is an excellent addition to the Cal Donovan series. We get to visit the past and present as murdered nuns seem to know have connection to previous deaths. Cal and Eli(sabetta) ‘s relationship grows stronger and they put their formidable skills to work as the aid the detectives.

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What a great book! I really enjoyed reading this. It was definitely a page turner that kept me up all night! I think you will like it too! Thanks for the great book!

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4 stars

A cracking police procedural. The detectives get the call of three dead nuns - murdered in their sleep at a local convent in Boston. The really odd thing is that their rosary beads are missing.

A story in the newspaper states that a medium’s spirit guide says the culprit is a local priest with a red nose.

It takes very little time for the police to hone in on the priest. Is he really the killer? When he is found dead in his room, the case gets closed. But there are doubts.

The medium connections takes the story in an interesting and exciting way to a discussion of the history of a family of Boston mediums, and surprisingly, a brief history of Sir Arthur Conan Doyle. He was a true believer of spiritualism. The book discusses the influence he had on the Boston family of mediums.

This is a real page turner. The twists and turns in the story are many, and interesting. I really liked this book and will recommend it.

The characters are well fleshed out. The writing is exceptional. The tension builds at a continuing pace.

I want to thank NetGalley and Book Whisperer - Lascaux Media for forwarding to me a copy of this good book. The opinions expressed in this review are solely my own.

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This is an even higher octane thriller in the Cal Donovan series! Thank you to Book Whisperer/NetGalley for the DRC of this book. I have read the previous books in the series and was thrilled to see how Cal has personally grown through his past experiences. This book has a little more of a personal slant considering that Elisabetta has left the Vatican and is now working regularly alongside Cal. When three Nuns are murdered, both Cal and Elisabetta become involved tangentially due to their connection to the Church. This story mostly takes place in Boston bouncing from Cal in the present to Arthur Conan Doyle in the past. Cal takes a backseat to the detectives investigating the murder of the Nuns, and their disdain for the help offered by Cal and Elisabetta is evident. But as more information comes to light, the danger to both becomes present. There is less Catholic history and little archaeology in this book, but the church presence is strong and its flaws are not hidden. I found this edition to be very exciting considering the personal aspects for Cal and Elisabetta, and for the search for motive in the murders, for the mystical connection to our lost ones. There is a lot going on over multiple levels, coming together in a race to save the final Nun. This book is another hit out of the park for Cooper!

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