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Three Marys
Do you believe in miracles?
Three impossible births. Three incredible miracles. One deadly secret.
When three teenage girls in Mexico, the United States, and Ireland discover they are pregnant, each swears she is still a virgin, and medical tests prove them right. All three are Catholic, all three saw a blinding light before blacking out, and all three share the same Mary.
In Rome, a stunned Pope Celestine turns to Harvard professor Cal Donovan, his trusted expert in religion and archaeology, to investigate a phenomenon that looks terrifyingly like a replay of the Annunciation on a global scale. As news of the “Three Marys” breaks, pilgrims flood the girls’ homes, the media fuels a storm of hope and outrage, and powerful factions inside and outside the Vatican scramble to seize control of the miracle.
Cal’s investigation pulls him from the shadowed corridors of the Vatican to dusty border towns and the windswept Irish coast, where he begins to suspect that something far more calculated than a miracle is unfolding. When a colleague is kidnapped and the three girls vanish into a heavily guarded American estate, Cal finds himself facing a conspiracy willing to rewrite doctrine, weaponize faith, and sacrifice the Marys to a cause they barely understand.
A riveting religious thriller, Three Marys is a fast‑paced Cal Donovan novel that fuses Vatican intrigue, cutting‑edge science, and faith‑driven conspiracy into a provocative story about belief, power, and the dangerous seduction of “miracles” in the modern age.
Readers are loving this fast-paced religious thriller!
⭐⭐⭐⭐⭐ "Three Marys is a fascinating, well-written novel with a unique plot that lured this reviewer to read the book. I’m glad I did. From the first page to the final chapter, I wondered how the “miracle” pregnancies of three young virgins would be explained... Three Marys is a religious thriller and a recommended read." —Bayside Book Reviews
⭐⭐⭐⭐⭐ "It’s easy to get carried away in a book that has believable characters, intrigue in an intricate storyline. Three Mary’s ‘ticks off all the boxes’ for me. Highly recommended much enjoyed!" —Netgalley Review
⭐⭐⭐⭐⭐ "A strong sense of place, well-developed characters, and an enthralling plot all work together to keep the pages turning in this riveting thriller."—Netgalley Review
⭐⭐⭐⭐⭐ "What I loved most about this book is how it weaves together religious mystery with political intrigue and scientific skepticism. It’s fast-paced and thought-provoking, challenging readers to consider faith, power, and the lengths people will go to manipulate belief."—The Sassy Bookworm
Three impossible births. Three incredible miracles. One deadly secret.
When three teenage girls in Mexico, the United States, and Ireland discover they are pregnant, each swears she is still a virgin, and medical tests prove them right. All three are Catholic, all three saw a blinding light before blacking out, and all three share the same Mary.
In Rome, a stunned Pope Celestine turns to Harvard professor Cal Donovan, his trusted expert in religion and archaeology, to investigate a phenomenon that looks terrifyingly like a replay of the Annunciation on a global scale. As news of the “Three Marys” breaks, pilgrims flood the girls’ homes, the media fuels a storm of hope and outrage, and powerful factions inside and outside the Vatican scramble to seize control of the miracle.
Cal’s investigation pulls him from the shadowed corridors of the Vatican to dusty border towns and the windswept Irish coast, where he begins to suspect that something far more calculated than a miracle is unfolding. When a colleague is kidnapped and the three girls vanish into a heavily guarded American estate, Cal finds himself facing a conspiracy willing to rewrite doctrine, weaponize faith, and sacrifice the Marys to a cause they barely understand.
A riveting religious thriller, Three Marys is a fast‑paced Cal Donovan novel that fuses Vatican intrigue, cutting‑edge science, and faith‑driven conspiracy into a provocative story about belief, power, and the dangerous seduction of “miracles” in the modern age.
Readers are loving this fast-paced religious thriller!
⭐⭐⭐⭐⭐ "Three Marys is a fascinating, well-written novel with a unique plot that lured this reviewer to read the book. I’m glad I did. From the first page to the final chapter, I wondered how the “miracle” pregnancies of three young virgins would be explained... Three Marys is a religious thriller and a recommended read." —Bayside Book Reviews
⭐⭐⭐⭐⭐ "It’s easy to get carried away in a book that has believable characters, intrigue in an intricate storyline. Three Mary’s ‘ticks off all the boxes’ for me. Highly recommended much enjoyed!" —Netgalley Review
⭐⭐⭐⭐⭐ "A strong sense of place, well-developed characters, and an enthralling plot all work together to keep the pages turning in this riveting thriller."—Netgalley Review
⭐⭐⭐⭐⭐ "What I loved most about this book is how it weaves together religious mystery with political intrigue and scientific skepticism. It’s fast-paced and thought-provoking, challenging readers to consider faith, power, and the lengths people will go to manipulate belief."—The Sassy Bookworm
- GenresThriller
338 pages, Paperback
Published February 10, 2026
About the author
Glenn Cooper
56 books1,486 followersGlenn Cooper is an internationally bestselling thriller writer.
Glenn was born in New York City and grew up in nearby White Plains. He attended White Plains High School before enrolling at Harvard University in Cambridge, Massachusetts where he graduated from Harvard with an honors degree in archaeology. He then attended Tufts University School of Medicine and did his post-doctoral training at the New England Deaconess and the Massachusetts General Hospitals becoming a board-certified specialist in Internal Medicine and Infectious Diseases. After practicing medicine, Glenn began a research career in the pharmaceutical industry which culminated in an eighteen-year position as the Chairman and CEO of a biotechnology company in Massachusetts. Glenn began writing screenplays over twenty years ago and his interest in movies prompted him to attend the graduate program in film production at Boston University. He is currently the chairman of a media company, Lascaux Media, which has produced three independent feature-length films. In 2006 Glenn turned his hand to novel-writing. His debut novel, THE LIBRARY OF THE DEAD, the first in a trilogy, became an international bestseller and was translated into thirty languages. All of his seven published books have become top-ten international best-sellers.
Glenn currently lives in New Hampshire.
Glenn was born in New York City and grew up in nearby White Plains. He attended White Plains High School before enrolling at Harvard University in Cambridge, Massachusetts where he graduated from Harvard with an honors degree in archaeology. He then attended Tufts University School of Medicine and did his post-doctoral training at the New England Deaconess and the Massachusetts General Hospitals becoming a board-certified specialist in Internal Medicine and Infectious Diseases. After practicing medicine, Glenn began a research career in the pharmaceutical industry which culminated in an eighteen-year position as the Chairman and CEO of a biotechnology company in Massachusetts. Glenn began writing screenplays over twenty years ago and his interest in movies prompted him to attend the graduate program in film production at Boston University. He is currently the chairman of a media company, Lascaux Media, which has produced three independent feature-length films. In 2006 Glenn turned his hand to novel-writing. His debut novel, THE LIBRARY OF THE DEAD, the first in a trilogy, became an international bestseller and was translated into thirty languages. All of his seven published books have become top-ten international best-sellers.
Glenn currently lives in New Hampshire.
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Displaying 1 - 5 of 5 reviews
February 23, 2026
I read this book as a free review copy from NetGalley and this review is based on my reading the book and is a reflection of my honest feedback about the story.
I have read several of Glenn's books including other Cal Donovan adventures and this is easily one of Glenn Cooper’s more engaging and confident outings. It leans fully into religious mystery territory (a staple for Glenn Cooper who thrives in this vertical with some great books) and actually commits to the questions it raises rather than skimming the surface. I went in particularly curious and came out genuinely impressed.
The premise is bold and unsettling in the best way. Three young girls from different parts of the world, all named Mary become pregnant while still virgins. Naturally the Vatican panics and Cal Donovan is once again pulled in to investigate what could either be the greatest miracle in modern history or a carefully orchestrated catastrophe. From the start the story toys with belief, science, fear and power and it does so with real momentum.
What really worked for me was the tension between faith and explanation. Glenn never rushes to an answer and allows the story to explore how different characters react to the possibility of divine intervention. Believers see salvation skeptics see danger and institutions see control slipping through their fingers. That push and pull gives the novel weight and keeps it from feeling like a gimmick driven thriller.
The pacing is strong overall. Once the investigation begins the story moves quickly across locations and revelations build naturally rather than feeling forced. There are quieter moments but they feel intentional and give the reader space to sit with the implications of what is happening. I appreciated that the novel trusted its idea enough not to constantly rely on shock value.
Cal Donovan remains a familiar presence and while he does not evolve dramatically here he is still an effective guide through the chaos. Where the book really shines is in its handling of the three girls at the center of the mystery. They are not treated as plot devices but as real people caught in something far bigger than themselves and that grounding adds emotional impact to the larger themes.
My only real hesitation is that some resolutions come together a little too cleanly and a few side characters could have used more depth. Still these are small issues in a story that mostly delivers on its ambition.
Overall the Three Marys is smart, tense and surprisingly thoughtful. It asks uncomfortable questions and follows them through with confidence. For readers who enjoy religious thrillers that actually wrestle with belief rather than just exploiting it this one is absolutely worth picking up.
Four solid stars from me.
I have read several of Glenn's books including other Cal Donovan adventures and this is easily one of Glenn Cooper’s more engaging and confident outings. It leans fully into religious mystery territory (a staple for Glenn Cooper who thrives in this vertical with some great books) and actually commits to the questions it raises rather than skimming the surface. I went in particularly curious and came out genuinely impressed.
The premise is bold and unsettling in the best way. Three young girls from different parts of the world, all named Mary become pregnant while still virgins. Naturally the Vatican panics and Cal Donovan is once again pulled in to investigate what could either be the greatest miracle in modern history or a carefully orchestrated catastrophe. From the start the story toys with belief, science, fear and power and it does so with real momentum.
What really worked for me was the tension between faith and explanation. Glenn never rushes to an answer and allows the story to explore how different characters react to the possibility of divine intervention. Believers see salvation skeptics see danger and institutions see control slipping through their fingers. That push and pull gives the novel weight and keeps it from feeling like a gimmick driven thriller.
The pacing is strong overall. Once the investigation begins the story moves quickly across locations and revelations build naturally rather than feeling forced. There are quieter moments but they feel intentional and give the reader space to sit with the implications of what is happening. I appreciated that the novel trusted its idea enough not to constantly rely on shock value.
Cal Donovan remains a familiar presence and while he does not evolve dramatically here he is still an effective guide through the chaos. Where the book really shines is in its handling of the three girls at the center of the mystery. They are not treated as plot devices but as real people caught in something far bigger than themselves and that grounding adds emotional impact to the larger themes.
My only real hesitation is that some resolutions come together a little too cleanly and a few side characters could have used more depth. Still these are small issues in a story that mostly delivers on its ambition.
Overall the Three Marys is smart, tense and surprisingly thoughtful. It asks uncomfortable questions and follows them through with confidence. For readers who enjoy religious thrillers that actually wrestle with belief rather than just exploiting it this one is absolutely worth picking up.
Four solid stars from me.
July 9, 2026
Cal Donovan seriously angers his girlfriend when he bails on a promised trip to Iceland to meet with Pope Celestine, who has called him with an emergency. Three young girls across the world appear to be pregnant and still being virgins. The Pope wants Cal, his good friend and professor of religious studies at Harvard, to investigate. Cal flies to Manila, in the Phillippines, to meet with one Mary, who lives in a shanty town in a gang-ridden part of the city. He flies to Lima, Peru, to meet Mary, who lives in an extraordinatily remote village, high in the mountains. Cal asks his good friend, Father Murphy to to to Ireland to investigate the third Mary. Then all three girls are kidnapped and end up at a remote ranch in West Texas owned by a secretive billionaire. Bodies begin to pile up in the wake of the girls' disappearances. And when they deliver three healthy baby boys, the Catholic church goes wild. A former cardinal, who resigned from the Church led by Pope Celestine, declares himself the Pope of the New Catholic Church. A grand cathedral has been built at the ranch to display the three babies and their mothers. What is going on? Who stands to benefit from this? The plot is ingenious, but the exposition feels as though it was scotch-taped together in one chapter after pages and pages of buid-up.
March 16, 2026
I loved this book! The premise was one of the very best I have read in recent years and paid off throughout. I love the psychological twists and turns, peril and a bit of romance. This will absolutely be a Hollywood blockbuster in the next few years. Get in on the ground floor. 5 of 5 stars all day long!!!
February 24, 2026
I have read many books by this author and always enjoy them. They are very interesting and always have a good plot that keeps you turning pages.
March 25, 2026
An excellent premise and great characters. The plot dragged for me in the middle, but picked up about 65% into the story. Clever plot.
Displaying 1 - 5 of 5 reviews