P. J. Stray Books

Seeing is believing
Seeing is believing

By P. J. Stray, Patrick R. Green

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Explains the underlying scientific principles behind the way humans perceive, through a series of self-tests and puzzles.

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The Mystery of the Sea Dog s Treasures
Lost in Merlin s Castle Passport Mysteries Series No 3
Danger on Lighthouse Reef
Danger on Lighthouse Reef

By P. J. Stray

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When teenage twins Maddie and Mike visit their engineer father in Belize during spring break for his wedding, they become entangled in the mysterious sickening of the sea animals around the reef at...

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Danger on Lighthouse Reef Passport Mysteries Series
Danger on Lighthouse Reef
Danger on Lighthouse Reef

By P. J. Stray

Average: 0.00, 0 Ratings

When teenage twins Maddie and Mike visit their engineer father in Belize during spring break for his wedding, they become entangled in the mysterious sickening of the sea animals around the reef at...

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Lost in Merlin s Castle Passport Mysteries Series No 3
Secrets in the Mayan ruins
Secrets in the Mayan ruins

By P. J. Stray

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While touring the archaeological site of Chichen Itza, three teenagers uncover a plot to steal ancient Mayan artifacts.

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Secrets in the Mayan ruins
Secrets in the Mayan ruins

By P. J. Stray

Average: 0.00, 0 Ratings

While touring the archaeological site of Chichen Itza, three teenagers uncover a plot to steal ancient Mayan artifacts.

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If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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