| 1 | ''Signal in the Dark'' is a 1946 book by Mildred Wirt. It is the fourteenth installment in the Literature/PennyParker series. |
| 2 | |
| 3 | !!This books contains examples of: |
| 4 |
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FollowingContext Recap / PennyParkerBookFourteenSignalInTheDark
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