About the Book

Book: Stolen Secrets: A Thriller (Mirror Estate Series Book 7)

Author: S.F. Baumgartner

Genre: Thriller with Christian elements

Release Date: June 2, 2026

An adopted daughter. A vanished teenager. A secret that must stay hidden.

FBI Special Agent Charlie O’Rourke believed adopting Jamie Beth would keep her safe. But when her best friend vanishes during a school band rehearsal, Charlie discovers the threat isn’t random.

As Jamie Beth desperately searches for answers about her best friend’s disappearance, she has no idea she’s next.

To save his daughter, Charlie must choose between protocol and survival.

Perfect for readers who love the layered conspiracies of Daniel Silva, the emotional stakes of NCIS, and the shadow-war tension of The Blacklist.

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About the Author

S.F. Baumgartner crafts fast-paced Christian suspense thrillers, weaving tales of complex characters, secretive operatives, and relentless agents. Her gripping storytelling has earned acclaim, with Living Secrets and Forgotten Secret—Books 1 & 2 of her Mirror Estate series—named Top Picks in the thriller & suspense categories, respectively, at Killer Nashville, and Tangled Secrets—Book 3 of Mirror Estate series—won couple of awards in the Christian Indie Awards and the Incipere Awards. When she’s not plotting her next twist, she’s binge-watching crime TV shows, like NCIS or playing with her cats. Fans of James Patterson’s style, especially those who appreciate short, punchy chapters, will find much to love in her work. And as always, her books are all clean.

More from S.F.

Stolen Secrets is the seventh book in the Mirror Estate series, and for me it represents something I didn’t fully realize when I started writing it: the beginning of the end of the Ghost arc.

When I began the series, I never mapped out a long, eight-book storyline for the Ghost. In fact, I didn’t even think about how long that arc might last until around Book 6, Shadowed Secret. That’s when it started becoming clear that the threads surrounding the Ghost, Dylan, and the larger conspiracy needed more room to unfold. Book 8 will wrap up the Ghost storyline, though the Mirror Estate series itself is far from over. There are still many stories left to tell.

One of the continuing mysteries involves Dylan and the buried treasures connected to Mirror Estate. Whether that storyline concludes in Book 8 or continues beyond it is something I’m still discovering as the story evolves.

Stolen Secrets also includes a bonus story titled “Shadow Extraction.” Writing that novelette was one of the hardest parts of the project. It features Olivia in the middle of a black-ops mission that unfolds at the end of her honeymoon in Italy. The emotional and operational stakes in that story made it especially challenging to write, but it also became one of my favorite parts of the book.

Another element I enjoyed writing in Stolen Secrets involves Jamie Beth and Owen. Watching those two characters work their way through danger and figure out how to escape was incredibly rewarding as a writer. Those scenes capture something I love about thrillers—the moment when characters must rely on their own courage and quick thinking to survive.

Looking back, Stolen Secrets feels like a turning point for the series. Secrets are beginning to surface, alliances are shifting, and the long game surrounding the Ghost is finally moving toward its conclusion.

But even as that arc approaches its end, the world of Mirror Estate still holds plenty of secrets waiting to be uncovered.

Interview with the Author

What was one of the most surprising things you learned in creating your book?

Honestly? Just how much time and effort goes into writing and publishing a book. I knew it would be work, but until you’re in the middle of it: the drafting, the revising, the editing, the publishing process, you don’t fully appreciate the scope of it. It’s a labor of love in every sense of the phrase.

Do you read the genre you write? Why or why not?

Absolutely. I think it’s essential. If you want to write well in a genre, you need to know it and the best way to know it is to read it. Understanding what readers love, what the conventions are, and what makes a story in your genre work isn’t something you can figure out from the outside. You have to be a reader first.

What’s your favorite writing snack, drink, and/or music?

I actually keep it pretty simple: no music, no snacks, no drink at my side while I write. Music in particular I find too distracting; I need quiet to stay in my story. Some writers swear by their playlists and their coffee, but for me, fewer distractions means better focus.

Do you participate in writing challenges on social media? Why or why not?

I don’t. There just aren’t enough hours in the day! Writing the books takes priority, and social media challenges, while fun in concept, aren’t where my time goes right now.