Jessica Walker Books

The Secret Astronomers
The Secret Astronomers

By Jessica Walker

Average: 0.00, 0 Ratings

Two anonymous girls. One ancient astrophysics textbook. A decades-old secret.A fascinating, highly illustrated, epistolary novel perfect for fans of Rainbow Rowell and Alice Oseman.When a recent tr...

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The Secret Astronomers
The Secret Astronomers

By Jessica Walker

Average: 0.00, 0 Ratings

Two anonymous girls. One ancient astrophysics textbook. A decades-old secret.A fascinating, highly illustrated, epistolary novel perfect for fans of Rainbow Rowell and Alice Oseman.When a recent tr...

Read More

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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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