Karel Schrijver Books

Living with the Stars: How the Human Body is Connected to the Life Cycles of the Earth, the Planets, and the Stars

By Karel Schrijver

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One of ten billion earths

By Karel Schrijver

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Illustrated with images of the Solar System and of the Universe around it, this book explores how the discoveries within the Solar System and of exoplanets far beyond it come together to help us un...

Living with the Stars

By Iris Schrijver, Karel Schrijver

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One of Ten Billion Earths

By Karel Schrijver

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One of Ten Billion Earths

By Karel Schrijver

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Immersion

By Karel Schrijver

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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.