Tide Pool Troubles (Shelby & Watts)
Product Type: Bargain Books
List price: $7.99
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When Shelby gets a letter from Fred the hermit crab claiming that all the shells are missing from the beach, she and Watts are just the duo to help him. With Shelby's deductive skill and Watts's scientific knowledge, there's no case the two of them can't solve - one environmental mystery at a time!