Janet Halfmann Books

In the warmth of spring, a polar bear awakens and begins to teach her cubs what they need to know to survive in the harsh conditions of the north coast of Alaska, on the Arctic Ocean.

Polar Bear Horizon Smithsonian Oceanic

By Janet Halfman

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Polar Bear Horizon Smithsonian Oceanic

By Janet Halfman

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Polar Bear Horizon Smithsonian Oceanic

By Janet Halfman

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Alligator at Saw Grass Road Smithsonian Backyard Smithsonian Backyard

By Janet Halfman

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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.