Gloria Repp Books

77 Zebra Adventure of an Arctic Missionary

By Gloria Repp

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Mik Shrok Adventures of an Arctic Missionary

By Gloria Repp

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Swiss Holiday Mountain Adventures Series

By Gloria Repp, Elizabeth Yates

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Dave Durant and the Mystery of the Stone House Windrider Books

By Gloria Repp

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The secret of the golden cowrie

By Gloria Repp

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David Durant and his younger sister must live with their grandfather. They find that he will not talk about their father, a missionary, because he feels that their father stole a set of heirloom pi...

Night flight

By Gloria Repp

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When a rift between her unsaved parents takes sixteen-year-old Kelly, a recent Christian, to a new home near the Pine Barrens of New Jersey, her faith in God is tested by the change as she tries to...

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.