Ray O Ryan Books

Three s a crowd
Three s a crowd

By Ray O Ryan

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Zack is thrilled when his best friend on Earth, Bert Jones, visits for the weekend. But when Zack introduces Bert to Drake, his best friend on Nebulon, trouble begins! Zack is thrilled when his be...

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Three's a crowd!
Three's a crowd!

By Ray O Ryan

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Zack is thrilled when his best friend on Earth, Bert Jones, visits for the weekend. But when Zack introduces Bert to Drake, his best friend on Nebulon, trouble begins! Zack is thrilled when his be...

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A Green Christmas Galaxy Zack
A Green Christmas Galaxy Zack

By Ray O Ryan

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Drake makes a splash
Drake makes a splash

By Ray O Ryan

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When summer arrives on Nebulon, Zack discovers that his best friend, Drake, is afraid to learn to swim and decides to teach him before they go on a trip to water-covered planet Araxie. When summer...

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Galaxy Zack
Galaxy Zack

By Ray O Ryan

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Good-bye, Earth! Join Zack Nelson on his galactic adventures as he moves from Earth to Nebulon in the year 2120, explores a newly deiscovered planet, and helps a dinosaur return to its prehistoric...

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Science fair disaster
Science fair disaster

By Ray O Ryan

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When the Intergalactic Science Fair returns to Nebulon, the pressure is on for Sprockets Academy s students to uphold their winning streak. Zack is sure he can win. But when his project malfunction...

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Science Fair Disaster
Science Fair Disaster

By Ray O Ryan, Jason Kraft

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Ready Set Blast Off 15 Galaxy Zack
Ready Set Blast Off 15 Galaxy Zack

By Ray O Ryan

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123 pages : 20 cm

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Ready Set Blast Off
Ready Set Blast Off

By Ray O Ryan, Jason Kraft

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What is an EAN and How Does it Relate to an ISBN?

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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