The Castle in the Sea cover

By Mardi McConnochie

The Castle in the Sea

Twins Annalie and Will Wallace return in this action-packed sequel to the stunning cli-fi novel The Flooded Earth

It’s been months since their father, Spinner, disappeared after the Admiralty tore apart his workshop and sent him into hiding, but Annalie and Will are determined to find him, whatever the cost. With the help of new friends Essie and Pod (and talking parrot, Graham), the siblings use the decoded clues Spinner left behind to track his movements, sailing around the world in search of his old scientific colleagues.

But the Admiralty is still in hot pursuit, and the sea might be the biggest threat of all. As the children battle massive storms, menacing marines, and pirates out to steal anything (and anyone) they can, the twins and their friends discover new levels of strength, determination, and ingenuity within themselves. They also begin to wonder if they’ll ever catch up to Spinner, or if the dangers they encounter along the way will seal their fates first.

The Castle in the Sea is the sequel to the 2019 Green Earth Award-winning novel The Flooded Earth

Available In


Ages 9-12
ISBN: 978-1-77278-083-3
List Price: $19.95 CAD / $17.95 USD
Hardback with reinforced binding & with printed dust jacket
Trim Size: 5.50 x 8.00 inches / 13.97 x 20.32cm
Pages: 304

Distributed in Canada by University of Toronto Press

Distributed in the U.S. by Ingram Publisher Services

Carton Quantity: 32

About this book



Praise for The Castle in the Sea

Publishers Weekly “Noteworthy Novel Sequels: June 2019” selection

“As in the first book, this sequel offers commentary on the refugee crisis, often using humor to alleviate the tense material, but McConnochie also delivers higher stakes, daring escapes, wild storms, and pirate battles in a second adventure sure to please young thrill-seekers.”—Booklist

“Readers will be engrossed in this action-packed adventure story and will eagerly await the next installment. VERDICT A satisfying, high-stakes sequel.”—School Library Journal

“This equally fast-paced, action-driven sequel to The Flooded Earth…begins to explore the scientific and ethical challenges of climate-altering technology, leaving plenty of questions to be resolved in the next volume.”—The Horn Book Magazine

“A post-apocalyptic disaster story with the cozy feel of Swallows and Amazons.”—Kirkus Reviews

The Castle in the Sea continues the highly suspenseful adventure, strong characterization, and intriguing speculation on a very real-seeming future that made The Flooded Earth so satisfying….But again, it is the incredible and thrilling pace of the story, and the almost effortless flow for the reader, that make this book as likeable and compelling as it is profound and thought-provoking….The final installment in the trilogy cannot come too soon! Highly Recommended.”—CM Magazine

“Rating E…The Castle in The Sea will keep you diving in for more.”—Resource Links

“This is a story of resilience and determination as the four children use the resources and skills they have as they deal with new and often frightening situations. The terrible strength of water arises more than once here, and they learn to look for solutions that are not always the obvious ones….Looking forward to the third book.”—Canadian Bookworm

“There was a lot of science in this book…[T]he kids had to solve their problems using the things they found in nature. Since they were on a boat, there were many nautical problems, such as sailing without any wind and navigating through a storm. This is a great way to teach kids how to solve their problems anywhere. I really enjoyed this story!”—Jill Jemmett


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