Christopher Idzikowski Books

The Insomnia Kit

By Christopher Idzikowski

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Beating Insomnia

By C.J. Idzikowski

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Learn to Sleep Well

By Christopher Idzikowski

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Sound Asleep

By Dr Chris Idzikowski

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All too many of us are not getting the quality or amount of sleep we need. Perhaps we have difficulty drifting off, or we lie awake in the small hours, or have problems with a restless partner, or...

Learn to Sleep Well

By C.J. Idzikowski

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Learn to Sleep Well Kit

By C.J. Idzikowski

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Learn to sleep well

By Christopher Idzikowski

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Aprender a Dormir Bien

By Chris Idzikowski

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Como dormir mejor

By Christopher Idzikowski

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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.