Thyra Heder Books

Sophie is uninterested in writing a research report on polar bears until a polar bear named Olafur swoops her away to the Arctic, where she learns all about the playful bear's habits and habitat, f...

Alfie

By Thyra Heder

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Nia loves Alfie, her pet turtle. But he s not very soft, he doesn t do tricks, and he s pretty quiet. Sometimes she forgets he s even there! That is until the night before Nia s seventh birthday, w...

Penny and Jelly

By Thyra Heder, Maria Gianferrari

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Penny and Jelly

By Thyra Heder, Maria Gianferrari

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Nose to Nose

By Thyra Heder

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How Do You Dance

By Thyra Heder

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Fraidyzoo

By Thyra Heder

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Little T remembers that she was frightened last time her family visited the zoo but not why, so her creative family helps by imitating animals from A to Z until she recalls exactly what caused her...

Fraidyzoo

By Thyra Heder

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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.