Shadow of the Shark

From Author Wars - https://authorwars.com/publications/shadow-of-the-shark-960576.html

Overview:

Title: Shadow of the Shark
Author: Mary Pope Osborne
Year: Unknown
ISBN-10: 9780553510812
Publisher: Random House
Price: $12.99
Pages: 130+[6]
Binding: Hardcover
Type: Novel
Title Reference: Shadow of the Shark
Notes: C$15.99. Second printing by number line. First Edition. Excerpt from Magic Tree House Fact Tracker: Sharks and Other Predators on page 131.