190,000+ Books, Games & Puzzles in-stock 🇳🇿 

Come visit us in-store this weekend! 📚 Open 7 days, 8:30am–5pm

My Sister is Going to Kill Me

A Novel
Brief Description
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-centred whodunnit about two sisters who work together to find a killer as they raft down the rapids of the Grand Canyon. What's a... Read More
Format: Paperback / softback
$3100
Elsewhere:
$3699
OVERNIGHT NZ-WIDE DELIVERY

Found a better price? Request a price match

Book Hero Magic formatted this description to make it easier to read. While it's new and still learning, it may not be perfect - your feedback is welcome! Description

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-centred 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 colour-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 traveller 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.

Book Details

INFORMATION

ISBN: 9780063583719

Publisher: HarperCollins Publishers Inc

Format: Paperback / softback

Date Published: 06 October 2026

Country: United States

Imprint: HarperCollins

Audience: General / adult

DIMENSIONS

Weight: 300g

Pages: 352

About the Author

Nina Simon has worn many hats: NASA engineer, slam poet, mystery game designer, museum director, and global nonprofit founder. She is an Ashoka fellow and the founder of OF/BY/FOR ALL, a global nonprofit that creates digital tools to help civic and cultural organizations become more inclusive, relevant, and sustainable. Nina is an in-demand writer and speaker about community participation in museums, libraries, parks, and theaters. Her work has been featured in the Wall Street Journal, New York Times, NPR, and on the TEDx stage. Born and raised in Los Angeles, Nina now lives off-the-grid in the Santa Cruz mountains with her husband and daughter. Mother-Daughter Murder Night is her first novel.

Also by Nina Simon

View all
  • Mother-Daughter Murder Night
    NEW YORK TIMES BESTSELLER - REESE’S BOOK CLUB PICK Nothing brings a family together like a murder next door. “I just loved how intriguing the mystery is but also the dynamics between a grandmother, a mother, and a teenage daughter." —Reese Witherspoon Think: Gilmore Girls, but with murder. High-powered businesswoman Lana Rubicon has a lot to be proud of: her...
    Paperback
    $5300
    Available
    Ships in 2-3 weeks

More from General Fiction

View all
  • Yesteryear
    A BOLD AND BITING SATIRE. WILL HAVE YOU GASPING TO THE FINAL PAGE — Nita Prose WICKEDLY FUNNY, BEAUTIFULLY WRITTEN AND FRIGHTENINGLY PERCEPTIVE — Abigail Dean INVENTIVE, ADDICTIVE, A WILD RIDE — Ashley Audrain SHOT THROUGH WITH HUMOUR AND LACED WITH DARKNESS — Clare Mackintosh The Stepford Wives meets The Handmaid's Tale — Hannah Deitch My name was Natalie Heller...
    Paperback
    $2999
    Elsewhere:
    $3699
    (3)
    In Stock
    Ships Monday
  • Theo of Golden
    THE INTERNATIONAL BESTSELLING PHENOMENON'For anything to be truly good, there must be love in it. Nothing is what it's supposed to be if love is not at the core.' One morning, a stranger arrives in the town of Golden. No one knows who he is or where he came from…His name is Theo and he's arrived there by chance –...
    Paperback
    $2899
    Elsewhere:
    $3499
    (6)
    In Stock
    Ships Monday
  • The Wedding People
    'BEST READ OF THE YEAR SO FAR' THE TIMES 'BOOKS AS FUN AS THIS ONE ARE FEW AND FAR BETWEEN' GUARDIAN Phoebe Stone arrives at a grand beachside hotel in Rhode Island wearing her best dress and least comfortable shoes. Immediately she is mistaken for one of the wedding people — but she's actually the only guest at the Cornwall...
    Paperback
    $2399
    Elsewhere:
    $2799
    (3)
    In Stock
    Ships Monday
  • New Release
    A Court of Splintered Harmony
    Romance, danger, and intrigue await you in the breathtaking sixth book in the #1 bestselling Court of Thorns and Roses (ACOTAR) series.What was broken will be remade.Deep in the heart of the continent, Koschei the Deathless is stirring. Though he's been bound to a mountain lake for millennia, the insidious threat of his return now spreads across the Fae territories,...
    Paperback
    $3199
    Elsewhere:
    $3699
    (2)
    In Stock
    Ships Monday
  • New Release
    Threshing Day
    The next book in the blockbuster Empyrean series, Threshing Day contains thirteen stories starring your favorite characters and their dragons. The deluxe first edition includes sixteen beautiful original full-color illustrations by artist Joe Requeza.    Rebecca Yarros is the #1 New York Times, USA Today, and Wall Street Journal bestselling author of over twenty novels, including Fourth Wing and In the...
    Hardback
    $6999
    In Stock
    Ships Monday
  • Throne of Glass Box Set (Paperback)
    Enter the realm. Unleash the darkness. Live the legend. Discover the worldwide phenomenon of the #1 New York Times-bestselling Throne of Glass series in this gorgeous 8-book box set! In a land without magic, an assassin is summoned to the castle. She has no love for the vicious king who rules from his throne of glass, but she has not...
    Set
    $12400
    Elsewhere:
    $15500
    (6)
    In Stock
    Ships Monday
  • Assassin’s Apprentice
    Assassin's Apprentice by Robin Hobb marks the beginning of an extraordinary adventure in the rich and immersive world of the Six Duchies. Set against the backdrop of a kingdom teetering on the brink of civil war, this gripping tale introduces readers to FitzChivalry Farseer, a royal bastard whose existence threatens the stability of the crown. When the crown prince's secret...
    Paperback
    $1900
    Elsewhere:
    $2299
    In Stock
    Ships Monday
  • A Court of Thorns and Roses Paperback Box Set (5 books)
    All five of the Court of Thorns and Roses paperbacks packaged together in a gorgeous box set. "Passionate, violent, sexy and daring." —USA TODAY on A Court of Thorns and Roses Feyre is a huntress. The skin of a wolf would bring enough gold to feed her sisters for a month. But the life of a magical creature comes at...
    Set
    $9999
    Elsewhere:
    $12495
    (4)
    In Stock
    Ships Monday
  • John of John
    The stunning new novel from the Booker Prize-winning, Sunday Times-bestselling author of Shuggie Bain and Young Mungo.'John of John has the emotional range and sense of sympathy of his earlier books, but this book is special, it has an urgency, an immediacy, a brilliant sense of place, the drama of fierce emotion repressed, concealed and volcanically exposed' - Colm Tóibín'To read John of John is to move to...
    Paperback
    $3099
    Elsewhere:
    $3800
    (4)
    In Stock
    Ships Monday
  • New Release
    Chain Reaction
    Jack Reacher, \"the coolest continuing series character\" (Stephen King), returns in a brand new, pulse-pounding read from Lee and Andrew Child. The world’s bestselling hero is back in a brand new, high-octane adventure! ‘She knew that finding Reacher would not be easy . . .’ Washington DC. General Susan Turner needs help from the only guy she knows will get...
    Paperback
    $2999
    Elsewhere:
    $3800
    (3)
    In Stock
    Ships Monday
  • A Court of Wings and Ruin
    The third instalment of the GLOBAL PHENOMENON, romantic fantasy epic and TikTok sensation, ACOTAR. From multi-million and #1 Sunday Times bestselling author Sarah J. Maas. In A Court of Wings and Ruin, the gripping third book of the ACOTAR series, Feyre Archeron faces the ultimate battle for her world. Having returned to the Spring Court, she is determined to gather...
    Paperback
    $2100
    Elsewhere:
    $2299
    (1)
    In Stock
    Ships Monday
  • The Things We Never Say
    Internationally bestselling and prize-winning author Elizabeth Strout's new novel tells the story of a chance incident in a man's life—a poignant meditation on loneliness, friendship, and free will in a capsizing world. Artie Dam is a man with a secret. He spends his days teaching history to high schoolers, expanding their young minds, correcting their casual cruelties, and lending a...
    Hardback
    $3200
    Elsewhere:
    $3800
    (6)
    In Stock
    Ships Monday

Why buy from us?

Book Hero is not a chain store or big box retailer. We're an independent 100% NZ-owned business on a mission to help more Kiwis rediscover a love of books and reading!

Service & Delivery

Service & Delivery

Our warehouse in Auckland holds over 190,000 books, toys, board games and puzzles in-stock so you're not waiting for your order to arrive from overseas.

Auckland Bookstore

Auckland Bookstore

We're primarily an online store, but for your convenience you can pick up your order for free from our bookstore, which is right next door to our warehouse in Hobsonville.

Our Gifting Service

Our Gifting Service

Books make wonderful thoughtful gifts and we're here to help with gift-wrapping and cards. We can even send your gift directly to your loved one.

General Fiction lists from the team

Explore our curated lists from our heroes to find your next read!