Armstrong Sperry Books

Call It Courage

By Armstrong Sperry

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Call It Courage

By Armstrong Sperry

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Relates how Mafatu, a young Polynesian boy whose name means Stout Heart, overcomes his terrible fear of the sea and proves his courage to himself and his people.

Call It Courage

By Armstrong Sperry

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Great River, Wide Land

By Armstrong Sperry

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Rain Forest

By Armstrong Sperry

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River of the West

By Armstrong Sperry

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Call It Courage

By Armstrong Sperry

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Boy Who Was Afraid

By Armstrong Sperry

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Boy Who Was Afraid

By Armstrong Sperry

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The Boy Who Was Afraid

By Armstrong Sperry

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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.