The Case of the Blue-Ribbon Horse
The New Adventures of Mary-Kate and Ashley seriesbook 3 of 25
The Case of the Missing Mummy(1998) →
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There's a big mystery at Mary-Kate's horseback riding school! Someone keeps putting Mary-Kate's horse in the wrong stall and feeding it the wrong food—and Mary-Kate is getting in major trouble! The Trenchcoat Twins must solve this case—and fast—before Mary-Kate is kicked out of the upcoming horse show!
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