M.D. Mark E. Williams Books

The Art And Science Of Aging Well

By Mark E. Williams, M.D. Mark E. Williams

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In the past century, average life expectancies have nearly doubled, and today, for the first time in human history, many people have a realistic chance of living to eighty or beyond. As life expect...

Geriatric Physical Diagnosis

By Mark E. Williams, M.D. Mark E. Williams

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Informed By More Than Thirty Years Of Experience, This Guide Provides A Wealth Of Insight Into The Clinical Observation, Diagnosis And Treatment Of Elderly Patients. Organized Geographically From (...

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.