Allen Gifford Books

Mindmaster

By Tony Gifford, Allen Gifford, Clive Gifford

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Living Well With HIV and AIDS

By Kate Lorig, Allen Gifford, Virginia Gonzalez, Diana Laurent

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New drugs and drug combinations have turned HIV/AIDS into a long-term illness rather than a death sentence. Practical advice on mental adjustments and physical vigilance is outlined here.

Living Well with HIV AIDS

By Kate Lorig, Allen Gifford, Virginia Gonzalez, Diana Laurent

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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.