Brian Holley Books

A Level syllabus studies history and physics

By Brian Holley

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Economics education 14-16

By B. J. Holley, Brian Holley

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Plants and flowers

By Barb Macekan, Brian Holley, Brian Holly

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Text and pictures explain how plants and flowers grow and reproduce, and provide indoor gardening tips.

Bugs & critters

By Brian Holley

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Text and pictures present the unique aspects of insects and introduce some well-known examples.

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.