The Obsidian Eye: Uncovering Secrets Beneath Upland – A Sisterhood Sleuths Mystery
- Cathy Warshaw
- Mar 24
- 3 min read
Something is stirring beneath the streets of Upland… and it begins with The Obsidian Eye.
Welcome to Upland, California—a picturesque city nestled at the base of the San Gabriel Mountains, where sunny days, community charm, and peaceful neighborhoods hide a secret far older—and darker—than anyone could imagine.
In The Obsidian Eye, the first thrilling installment of the Sisterhood Sleuths series, readers are introduced to Chloe and Lily—two sisters whose curiosity and courage pull them into a hidden world of ancient relics, coded messages, and a global conspiracy that starts right in their own backyard.
But this isn't just another teen mystery. This is the Sisterhood Sleuths: a global, female-led adventure series that begins with a single question—
What if everything you believed about your hometown… was a lie?
The SISTERHOOD SLEUTHS Mystery Begins in Upland
Upland might seem like an ordinary city—its tree-lined streets, historic buildings, and charming downtown district give no clue to the labyrinth of secrets buried beneath. But in The Obsidian Eye, Upland becomes the perfect setting for mystery and mayhem.
As Chloe (20) and Lily (18) dig into a strange relic that falls into their hands—a polished black disk with impossible symbols—they soon discover that Upland was once a vital crossroads in a forgotten war between secret societies. Clues are hidden in the architecture, encoded in church windows, and even buried under Mount Baldy.
Locals they once trusted seem to know more than they let on. And some… will do anything to keep the past buried.
Meet the Sleuths Behind the Sisterhood
Chloe – The older sister, tall and sharp-witted, with a natural talent for puzzles and a growing instinct for leadership.
Lily – Younger but fiercely loyal, with a gift for languages and observation. Her knack for noticing the smallest details often makes the biggest difference.
Gil – A mysterious Israeli with a military past and a mind built for strategy. He joins the sisters with secrets of his own.
Thalia, Mei, Luca, Yuki, Aoife, Raj, and more – A diverse, international team brought together by fate—and a mission to stop The Society before it’s too late.
Together, they uncover a hidden battle between The Society—a powerful global organization manipulating history—and a secret network determined to stop them.
Upland: More Than Meets the Eye
This debut novel doesn’t just use Upland as a backdrop—it transforms it into a living, breathing puzzle box. Readers will explore:
Real-life locations like the Madonna of the Trail statue, the Magic Lamp, the Cooper Museum, and the mysterious underground tunnels rumored to exist beneath the city.
Local legends and landmarks are repurposed with hidden meanings and cryptic clues.
A town of secrets, where no one is exactly who they seem—and the past never stays buried.
Whether you’re a local or a visitor, you’ll never see Upland the same way again. Join the Sisterhood Sleuths Mystery!
Why Readers Can’t Put It Down
✅ A diverse cast of international characters
✅ Thrilling plot full of twists, escapes, and riddles
✅ Clean, teen-friendly content perfect for ages 12+
✅ Deep lore and ancient mysteries woven into real-world settings
✅ The beginning of a globe-spanning adventure across Israel, Switzerland, Italy, France, Ireland, Iceland, and Japan
The Obsidian Eye has been praised for its fast-paced narrative, strong female leads, and mind-bending mysteries that keep readers hooked from page one.
Are You Ready to Join the Sisterhood?
The Obsidian Eye isn’t just a story—it’s an invitation.
To see your world differently.
To look deeper.
To follow the symbols others ignore.
To uncover the truth hidden in plain sight.
And it all starts in Upland.
🎯 Available Now, The Sisterhood Sleuth’s Coloring Book
🔍 Coming Soon, in hardback, paperback, and Kindle, with Spanish and Hebrew editions.
🎯 Coming Soon, explore the Sisterhood Sleuths App for real-life communities, puzzles, scavenger hunts, prizes, and more.
🎯 Coming Soon, The Obsidian Eye Monopoly Game in English and Spanish.
The Obsidian Eye (c) Cathy Warshaw, 2025
Disclaimer:
This article is a work of fiction. While some locations, events, and individuals are inspired by actual events, places, and figures, all characters have been fictionalized. The events depicted in this story are entirely fictional. Any resemblance to real persons, living or deceased, is purely coincidental and unintentional for all other characters.
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