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Staff Reviews

Spy School at Sea is a great book that continues The Spy School series. Ben gets called on a top secret mission, with his best friend Mike and the best spy he knows, Erica. The mission seems far more dire then anyone predicted and the stakes could not be higher! From being thrown off ships to flying a plane Ben goes through a lot. Anyone who loves mystery, adventure or realistic fiction would really enjoy this novel! -- Anoushka

Stuart Gibbs keeps the Spy School series unpredictable with this new installment! It picks up where book 8 left off with more action and a new cover.I recommend this series to fans of James Ponti. -- Brooke

— From Student Reviews


In the ninth and latest addition to the New York Times bestselling Spy School series, Ben Ripley faces his nemesis, Murray Hill, on the high seas.

Thanks to the evidence Ben uncovered in his investigation of the Croatoan, the CIA has tracked his nemesis, Murray Hill, to Central America, where they believe he is boarding the world’s biggest cruise ship, The Emperor of the Seas, on its maiden voyage around the world.

His mission: Pose as part of a family, with Alexander and Catherine Hale as his parents, Erica as his sister, and his best friend Mike as his brother, to find out what Murray is plotting.

At first, it sounds exciting to have a mission on the most glamorous ocean liner on earth, but as usual, nothing goes according to plan. There is action, danger, and plenty of surprises as Ben and his team quickly find themselves in hot water.

About the Author

Stuart Gibbs is the New York Times bestselling author of the Charlie Thorne series, the FunJungle series, Moon Base Alpha series, and Spy School series. He has written screenplays, worked on a whole bunch of animated films, developed TV shows, been a newspaper columnist, and researched capybaras (the world’s largest rodents). Stuart lives with his family in Los Angeles. You can learn more about what he’s up to at

Praise For…

"Recommended purchase for all libraries where plucky kid sleuths and the “Spy School” is popular."
Product Details
ISBN: 9781534479432
ISBN-10: 1534479430
Publisher: Simon & Schuster Books for Young Readers
Publication Date: August 31st, 2021
Pages: 352
Language: English
Series: Spy School