Stolen Secrets and Lethal Design: Unraveling a Compelling Mystery

July 6, 2026
S.F. Baumgartner

By S.F. Baumgartner

Stolen Secrets & Lethal Design
Stolen Secrets & Lethal Design

I know many of you have been waiting for Lethal Design, Book 2 in my KC & Orlando Prime series, and I’m excited to say the wait is almost over!

Watch the Lethal Design Trailer

Lethal Design official book trailer

If you’re anything like me, you enjoy those crossover episodes on shows like One Chicago, FBI, NCIS, and their spin-offs. Watching familiar characters from different teams come together to solve a case always makes for an exciting story.

That idea inspired me as I wrote Stolen Secrets, Book 7 of the Mirror Estate series, and Lethal Design.

If you’ve already read Stolen Secrets, you’ll remember the mysterious figure known as The Architect. If you’ve been wondering what happens next, Lethal Design continues that story as the Orlando Prime task force, along with KC and Spaulding, pursues the investigation.

Don’t worry if you haven’t read Stolen Secrets. Lethal Design is written to stand on its own, and you’ll have everything you need to follow the case. However, readers of both books will enjoy seeing how the larger story connects across the two series.

For those who enjoy reading early, advance review copies are now available through NetGalley, BookSirens, BookSprout, and StoryOrigin.

Lethal Design officially releases on August 4, 2026, and is now available for preorder.

As always, the ebook will be available in Kindle Unlimited, while the paperback and large print editions will be available through major online retailers and libraries.

I can’t wait for you to join KC, the Orlando Prime team, and familiar faces from Mirror Estate as they race to uncover the truth behind one of their most dangerous investigations yet.

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