Deborah Andrews Books

Summer Sudoku
Summer Sudoku

By Deborah Andrews

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Masyu Puzzles
Masyu Puzzles

By Deborah Andrews

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Mind Puzzles for Kids
Mind Puzzles for Kids

By Deborah Andrews

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Worlds Hardest Puzzles
Worlds Hardest Puzzles

By Deborah Andrews

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Brain Puzzle Level 2
Brain Puzzle Level 2

By Deborah Andrews

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Brain Teaser for Adults
Brain Teaser for Adults

By Deborah Andrews

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Related Articles from our Blog

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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