P. J. McMahon (McMahon, P. J.)

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  The Case of the Psychic Hamster
  by Copyright Paperback Collection (Library of Congress), P. J. McMahon
  Hardcover, Aladdin Paperbacks, ISBN 1415577250 (1-4155-7725-0)
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  The Case Of The Psychic Hamster: Secret File #4
  by John Manders, P. J. McMahon
  Softcover, Simon & Schuster, ISBN 0689862636 (0-689-86263-6)
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  The Case of the Singing Sea Dragons
  by Copyright Paperback Collection (Library of Congress), P. J. McMahon
  Hardcover, Aladdin Paperbacks, ISBN 1415642214 (1-4156-4221-4)
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  The Case of the Singing Seadragons: Secret File 6
  by P. J. McMahon, John Manders
  Softcover, Simon & Schuster, ISBN 1416900500 (1-4169-0050-0)
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  The Case of the Smiling Shark: Secret File # 2
  by P. J. McMahon, John Manders
  Softcover, Simon & Schuster, ISBN 068986261X (0-689-86261-X)

  More editions of The Case of the Smiling Shark: Secret File # 2:

  • The Case of the Smiling Shark: Secret file # 2: Hardcover, Demco Media, ISBN 0606325190 (0-606-32519-0)
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  The Mystery of the Diappearing Dinosaurs
  by P. J. McMahon
  Hardcover, Aladdin Paperbacks, ISBN 1415607788 (1-4156-0778-8)
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  The Mystery of the Morphing Hockey Stick
  by P. J. McMahon, John Manders
  Softcover, Simon & Schuster, ISBN 0689862628 (0-689-86262-8)
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  The Mystery of the Swimming Gorilla: Secret File #1 The Mystery of the Swimming Gorilla
  by P. J. McMahon, John Manders
  Softcover, Simon & Schuster, ISBN 0689862601 (0-689-86260-1)