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Magic Tree House (31) Summer of the Sea Serpent (edition 2011)
by Mary Pope Osborne, Sal Murdocca (Illustrator)
Magic Tree House #31: Summer of the Sea Serpent by Mary Pope Osborne
References to this work on external resources.
Wikipedia in English
Amazon.com Product Description (ISBN 0375827358, Hardcover)Jack and Annie are off on another mythical mission at the request of Merlin the magician. Luckily, they have a young sorcerer, Teddy, to help them. From underwater caves to a Spider Queen, from mystical selkies to a magical sword, this is a Magic Tree House adventure kids won’t want to miss!
(retrieved from Amazon Thu, 12 Mar 2015 18:17:46 -0400)
Jack and Annie travel in their magic tree house to the land of the mystical selkies to seek a magical sword for Merlin.
(summary from another edition)
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