Chris Humphreys Books

The hunt of the unicorn

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Despite strange dreams and her ailing father's firm belief in the family lore of a long-ago ancestor's connection to the mythical unicorn, fifteen-year-old New Yorker Elayne remains skeptical until...

The hunt of the unicorn

By Chris Humphreys

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Possession

By Chris Humphreys

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The hunt of the unicorn

By Chris Humphreys

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The fetch

By Chris Humphreys

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After he and his cousin Kristin discover a sea chest full of runes and a journal belonging to their deceased Norwegian grandfather, fifteen-year-old Sky summons the old man's ghost, who teaches him...

French Executioner

By C. C. Humphreys

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French Executioner

By C. C. Humphreys

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Jack Absolute

By C. C. Humphreys

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Blooding of Jack Absolute

By C. C. Humphreys

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Absolute Honour

By C. C. Humphreys

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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.