A tale of high waves and high adventure for Jack and Annie when the tree house lands in the sea off the coast of Ireland. Things get dangerous when Viking ships approach!
| ISBN: | 9781862309159 |
| Publication date: | 7th January 2010 |
| Author: | Mary Pope Osborne |
| Publisher: | Red Fox an imprint of Penguin Random House Children's UK |
| Format: | Paperback |
| Pagination: | 81 pages |
| Series: | Magic Tree House |