Dianne Wolfer Books

Butterfly notes

By Dianne Wolfer

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Ironkid

By Dianne Wolfer

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Being Billy

By Dianne Wolfer

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Billy loved his big brother, Andrew, and when they were together, Billy forgot he was different. After Andrew went away to high school, their relationship changed until the discovery of Billy's act...

Being Billy

By Dianne Wolfer

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PM library extras

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Dolphin song

By Lauren St. John

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A second prophesy, this time involving dolphins, comes true for eleven-year-old Martine, an orphaned South African girl who has mystical powers over animals, when she embarks on a school trip to st...

Pmp Em Butterfly Notes

By Various

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Being Billy

By Diane Wolfer

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Jungle Trek

By RIGBY

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Border line

By Dianne Wolfer

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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.