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  • My Sister Is Going to Kill Me: A Novel – A Whitewater Whodunnit of Murder, Secrets, and Danger on the Grand Canyon

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My Sister Is Going to Kill Me: A Novel – A Whitewater Whodunnit of Murder, Secrets, and Danger on the Grand Canyon

by Nina Simon (Author) Format: Hardcover
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From the New York Times bestselling author of the runaway hit Mother-Daughter Murder Night, a Reese’s Book Club pick, comes another fun, family-centered whodunnit about two sisters who work together to find a killer as they raft down the rapids of the Grand Canyon.

What's a family vacation without a little murder?

Liv and Mandy Chisholm’s yearly sister trip is a sacred tradition, an attempt to bond as their lives increasingly diverge. Liv, the ever-practical older sister, packs the color-coded itineraries. Mandy, a bedazzled human tumbleweed, brings the spontaneity.

This year, the sisters take off for a rafting adventure through the breathtaking depths of the Grand Canyon with a group of strangers. But beyond the terrors of whitewater rapids, sibling squabbles, and rogue reptiles, the ferocious beauty of the river carries a darker undercurrent, and an unexpected guest: a murderer in their midst.

When a fellow traveler is found dead and another corpse hits the water, the rafting trip flips from idyllic sister vacation to high-stakes murder investigation. Every suspect has a secret, every clue is drenched in mystery, and Liv and Mandy can hardly trust each other, let alone their own instincts. With the river raging and danger around every bend, the Chisholm sisters must work together to catch a killer—and keep their relationship from capsizing—before it’s too late.

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  1. Print length
    352 pages
  2. Language
    English
  3. Publisher
    William Morrow
  4. Publication date
    August 18, 2026
  5. Dimensions
    10 x 2 x 2.7 inches
  6. ISBN-10
    0063478021
  7. ISBN-13
    978-0063478022
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From the Publisher

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My Sister Is Going to Kill Me
Mother-Daughter Murder Night

Editorial Reviews

Review

"A high-octane thriller about two sisters who have to solve a murder ... or die trying. Propulsive and page-turning, this is armchair adventure at its best." - Nita Prose, #1 bestselling author of The Maid series

"My Sister Is Going to Kill Me has all the tension and danger of a locked-room mystery set in the wide-open expanse of a wild and unpredictable landscape. A captivating and entertaining read." - Elle Cosimano, New York Times bestselling author of Finlay Donovan Is Killing It

"The perfect mix of adventure, suspense, and murder mystery, with the bonus of a spectacular setting. I was immediately sucked in by this pulse-pounding journey of two polar opposite sisters rafting in the Grand Canyon, and Nina Simon expertly crafts a cast full of unforgettable suspects while carefully balancing the drama of sisterhood. This mystery will completely transport you." - Kristen Perrin, New York Times bestselling author of How to Solve Your Own Murder

“[T]his fast-paced traditional whodunit centers on complicated family bonds.” - Booklist

About the Author

Nina Simon writes crime fiction about strong women. She is the author of the New York Times-bestseller Mother-Daughter Murder Night, which she wrote for her mother, as a way to entertain, comfort, and connect with her during a major health crisis. This debut novel was a Reese's Book Club pick, a Golden Poppy Award winner, and a "best of 2023" selection for Amazon, Barnes & Noble, CrimeReads, and Library Journal. Before turning to fiction, Nina wore many hats: NASA engineer, slam poet, game designer, museum director, and nonprofit CEO. Her work on community participation in museums, libraries, parks, and theaters has been featured in the Wall Street Journal, the New York Times, NPR, and the TEDx stage. Born and raised in Los Angeles, Nina now lives off-the-grid in the Santa Cruz Mountains with her family. More information can be found on her website, ninaksimon.com.

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About the author

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Nina Simon

Nina Simon

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I write crime stories about strong women. My first novel, MOTHER-DAUGHTER MURDER NIGHT, about a grandma, single mom, and teenage girl who come together to solve a murder mystery, is out now.

Writing is my joy. In college, I was an electrical engineering student by day and a slam poet by night. After a brief stint at NASA, I started designing interactive exhibits and eventually became a museum director. I wrote two books of nonfiction about participatory, relevant cultural institutions. I thought of nonprofits as my "real" job and writing on the side.

Then, my mom got sick. I quit my job to help care for her, and I found myself turning to fiction--crime stories especially--as a way to escape during a hard time. My mom and I both always loved mysteries, and I decided to try to write one myself, with a detective/hero based on her. Now, my mom is doing better, and I'm gratefully spending my days writing, reading, and dreaming up new stories.

I live off-the-grid in the Santa Cruz mountains with my family. You can find out more about me at https://ninaksimon.com/

I write a very occasional newsletter at https://ninaksimon.substack.com/

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