"When Emma finds an old note in a lost library book, she knows she has her next case. But when the clues lead to an off-limits tower in a New York City library, she has to learn an extra-special reporter trick: how to go undercover! Will Emma save the day, or get herself and her friends in big trouble?"--Cover.
Series:
Emma is on the air ; 4. Siegal, Ida. Emma is on the air ; 4.
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