Tintori's friendship with Jill Gregory quickly developed into a professional relationship. After trying to figure out a sensitive way to answer their children's questions about life and death, Tintori and Gregory decided to write a book designed to answer a wide range of questions children ask about God. The result was
What Does Being Jewish Mean?, in conjunction with
Rabbi E.B Freedman, published by
Simon & Schuster in 1991. The book has been reprinted 11 times and used by children and adults, Jews and non-Jews alike, as a primer on the basic concepts and principles of Judaism. Unlike other team efforts, Tintori and Gregory did not divide up or delegate tasks. Instead, they developed their thoughts and wrote in a single style, sitting side by side. This ability to write together, in one voice, has characterized their entire body of work since. Both writers have publicly discussed their writing methodology and the ability of each to anticipate the other's thoughts and even complete her sentences. The success of their first collaborative effort spurred them on to the next. In 1993, under the pseudonym Jillian Karr (a combination of Jill and Karen), they published Something Borrowed, Something Blue (
Doubleday,
Bantam Books). The novel - a story of intrigue involving four brides-to-be with secrets - was excerpted by
Cosmopolitan Magazine and released as a made-for-TV movie starring
Connie Sellecca,
Twiggy and
Ken Howard. In 1996, again writing as Jillian Karr, the writing team published
Catch Me If You Can (
Avon Books), a suspense novel about a kidnapped
Miss America. Both Jillian Karr books were published in hardcover and paperback editions and in multiple languages. Having been told that her paternal grandfather had survived the
Cherry Mine disaster, the worst mine fire in the history of the United States, Tintori began an exploration into the disaster that took the lives of 259 men and boys deep inside an Illinois coal mine. The result was
Trapped: The 1909 Cherry Mine Disaster (Atria Books, 2002). The book explores the senseless way the fire began, the failed efforts to rescue those down below, the heroism both above and below ground, and the impact it had on the lives of those involved. Increasingly interested in her family genealogy and heritage, she recounts the experiences of immigrants, including her own relatives, who had recently come from countries throughout Europe - particularly Italy - seeking success and finding only suffering and death in that mine. After its hardcover release, the book was published in paperback. Trapped has been optioned for film. In 2007, she returned to the world of fiction, again collaborating with her writing partner. Now writing as Karen Tintori and Jill Gregory, the duo published
The Book of Names (
St. Martin's Press). The book is a thriller based on the actual principles of the Kabbalah, which teaches that the world's existence requires that it be occupied by 36 righteous souls, called Lamed Vovniks, or
Tzadikim Nistarim in Hebrew. The novel begins with 33 of them murdered and the start of a race to keep them alive. The book has been published worldwide and translated into 20 languages. In particular, it is a best-seller in Germany, where websites and contests have been created about the book, with prizes including a trip to England. The book is published in hardcover, paperback, audio and electronic formats. Later that same year, Tintori revealed her own family's secret history – buried for 80 years out of guilt and shame – when she published
Unto The Daughters: The Legacy of an Honor Killing in a Sicilian-American Family [(St. Martin's Press)]. The book is a narrative nonfiction about the murder of her great-aunt, Frances Costa, in a Sicilian honor killing in Detroit 1919. Tintori has explained that she wrote the book to give Aunt Frances back her name and identity, to expose the ugly customs and traditions of honor for honor's sake, and to restore dignity to the new generations of women who followed. In that sense,
Unto The Daughters is not only an account of the legacy of Sicilian culture but an intensely personal family memoir. The book has been published in hardcover, paperback and electronic formats and was nominated for a Michigan Notable Book Award. In 2008,
The Illumination, another collaboration by Tintori and Gregory, was published by
St. Martin's Press and simultaneously by
Rowholt in Germany. This spiritual thriller, centered on a biblical treasure from the dawn of creation possessing the power to transform—or destroy—the world, also sold to numerous foreign countries. The book has been published in hardcover, paperback, audio and electronic formats. Tintori's first short story,
Down Under, was included in the first anthology released by Novelists Inc., published in 2012 by
Fiction Studio Books. Edited by Lou Aronica,
Cast of Characters is a multi-genre collection of short stories by 28 leading voices in fiction, including 11 New York Times bestselling authors. The anthology is published in paperback and electronic formats. Tintori contributed two pieces to
Italian Women in Chicago: Madonna Mia! QUI debbo vivere? an anthology published in 2013 by
Casa Italia, Chicago. Edited by Dominic Candeloro, Kathy Catrambone, and Gloria Nardini, the book was published the same year in Italy as
Donne Italiane a Chicago. The anthology is printed in paperback. Tintori has also contributed to
She Rises: How Goddess Feminism, Activism, and Spirituality? Volume 2, an anthology by MAGO Books. She has written for The Fifth Estate, The Detroit Jewish News, Primo Magazine,
Ovunque Siamo, and The Hamtramck Citizen (recapping her half hour alone, backstage, with The Beatles). Tintori is a member of Novelists Inc., International Thriller Writers, the Italian American Studies Association and Italian American Writers Association. == Relationship to Italy and commitment to Italian-American heritage ==