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The Countdown Conspiracy

by Katie Slivensky

Subject
Science Fiction - General
Age
6-8 years
Format
Hardcover
Pages
336
Publisher
HarperCollins
Size
15.0 cm × 21.6 cm
ISBN
9780062462558

Ambassador, you are go for launch in T- minus 5…4…3…2…. Get ready to blast off with this high-action, high-stakes middle grade adventure that’s perfect for fans of Chris Grabenstein and Peter Lerangis!

Miranda Regent can’t believe she was just chosen as one of six kids from around the world to train for the first ever mission to Mars. But as soon as the official announcement is made, she begins receiving anonymous threatening messages…and when the training base is attacked, it looks like Miranda is the intended target. Now the entire mission—and everyone’s lives—are at risk. And Miranda may be the only one who can save them.

The Martian meets The Goonies in this out-of-this-world middle grade debut where the stakes couldn’t be higher.


She wanted to be an astronaut. She never expected to become a detective.


Young Astronaut Training: Join one of six kids from around the world as they prepare for the first-ever mission to Mars, facing challenges they never trained for.A High-Stakes Conspiracy: When anonymous threats turn into real attacks, Miranda realizes someone is trying to stop the mission—and her along with it.Action-Packed Sci-Fi Thriller: Perfect for kids who love fast-paced adventure, this story is a race against time to uncover the truth before it’s too late.STEM for Kids: Packed with science, technology, and engineering, this is an exciting read for young fans of robotics and space travel.

About the author

Katie SlivenskyAuthor

Katie Slivensky has worked and volunteered at zoos and museums since age eleven. She grew up in Michigan and currently lives just outside of Boston. She is the author of The Seismic Seven and The Countdown Conspiracy. Find her online at www.katieslivensky.com.

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What reviewers said

“A diverse, well-rounded crew. Readers who get excited about all things STEM related will soak up the science sprinkled throughout with ease.”
Bulletin of the Center for Children’s Books
“With fleshed-out characters who are intelligent but act like preteens and teens, Slivensky’s action-packed narrative is about grappling with passions, insecurity, and questions of trust.”
School Library Journal
“This quick read with a twisty mystery and plenty of science action will appeal to a wide range of readers.”
Booklist Online
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© 2026 Peekabooks Inc. All Rights Reserved.