1637: Pilgrim's Passage

Book #40 of Ring of Fire
Published by Baen
Distributed by Simon & Schuster

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About The Book

The Ring of Fire Series Returns with Conflict and Intrigue in the Middle East!

The more things change, the more they stay the same. . . .

Jahanara Begum is on pilgrimage, a journey and rite every Muslim must essay if able. The uptimers of the USE Mission are escorting the princess in her travels to Jeddah before returning home, their mission accomplished and allies made of the court of Dara Shikoh, having helped to place him on the Peacock Throne.

But the pilgrimage is only the public-facing reason for her departure from Agra.

In reality, the Begum Sahib is also carrying her love child off to Jeddah in hopes of giving birth in secrecy. Everyone outside the Mission and her most loyal followers must be kept ignorant of the impending birth, a feat which would be hard enough if her brother hadn’t saddled her with the presence of her great aunt and frequent adversary, the sometime-empress Nur Jahan.

If the presence of her most brilliant adversary in her court wasn’t enough, a Mughal princess abroad is an important figure, and the political situation in the Hijaz—a complex of relations between Ottoman Bey, Sharif of the Hijaz, the Bedouin, and Persian interests—is about to boil over.

Can Jahanara Begum and her USE allies safely navigate the power politics of the Pilgrim’s Passage?

About The Authors

Griffin Barber spent his youth in four different countries, learning three languages, and burning all his bridges. A retired San Francisco police officer, Griffin lives the good life in East Tennessee with his wife and indifferent cats, his daughter having moved on to life in the big city.  He is the author, with Eric Flint, of 1636: Mission to the Mughals and1637: The Peacock Throne.

Eric Flint was the creator of the New York Times best-selling Ring of Fire series, the best-selling alternate history series of all time. Beginning with 1632, Flint—along with dozens of cowriters—chronicled what happened when the 20th-century town of Grantville, West Virginia, was transported through time and space to 17th-century Europe. In addition, Flint was the author, with New York Times best seller David Weber, of the Crown of Slaves Saga, as well as the Belisarius series with best-selling author David Drake. Flint was the editor of Jim Baen’s Universe, as well as numerous short story anthologies. Before becoming a writer, Flint worked as a trade union organizer, longshoreman, truck driver, auto worker, steel worker, oil worker, meatpacker, glassblower, and machinist. Eric Flint passed away in 2022.

Product Details

  • Publisher: Baen (August 4, 2026)
  • Length: 368 pages
  • ISBN13: 9781668073346

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Raves and Reviews

Praise for 1637: The Peacock Throne: 

"A story replete with many satisfying twists and turns." —Midwest Book Reviews

Praise for 1635: A Parcel of Rogues:

"The 20th volume in this popular, fast-paced alternative history series follows close on the heels of the events in The Baltic War, picking up with the protagonists in London, including sharpshooter Julie Sims. This time the 20th-century transplants are determined to prevent the rise of Oliver Cromwell and even have the support of King Charles." —Library Journal

Praise for 1634: The Galileo Affair:

"A rich, complex alternate history with great characters and vivid action. A great read and an excellent book." —David Drake

"Gripping . . . depicted with power!" —Publishers Weekly

Praise for Eric Flint's Ring of Fire series:

“This alternate history series is . . . a landmark . . .” —Booklist

“[Eric] Flint's 1632 universe seems to be inspiring a whole new crop of gifted alternate historians.” —Booklist

“ . . . reads like a technothriller set in the age of the Medicis . . . ” —Publishers Weekly

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