13 - Missing Formula by Mildred A Wirt Benson cover art

13 - Missing Formula by Mildred A Wirt Benson

13 - Missing Formula by Mildred A Wirt Benson

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 The Missing Formula is a thrilling young-adult mystery about orphan Anne Fairaday, who must uncover her father’s missing scientific formula before it falls into the wrong hands. With the help of her brave friend Madge Sterling, she embarks on a race against time filled with danger and deception.
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