Review Detail
5.0 1
Middle Grade Fiction
162
go and buy it its worth it
(Updated: June 08, 2026)
Overall rating
5.0
Plot
5.0
Characters
N/A
Writing Style
N/A
Illustrations/Photos (if applicable)
N/A
Reader reviewed by ben
Determined to learn the secret of the old mill, Frank and Joe employ a clever use to gain entrance and become trapped. There they unravel two mysteries, one involving a counterfeiting case and the other, a national security case their father is working on.
Determined to learn the secret of the old mill, Frank and Joe employ a clever use to gain entrance and become trapped. There they unravel two mysteries, one involving a counterfeiting case and the other, a national security case their father is working on.
G
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