Joan Clark Warner MS RD CDE Books

The Complete Idiot's Guide Glycemic Index Cookbook

By Lucy Beale, Joan Clark Warner MS RD CDE

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Cook these recipes up-and keep blood sugar down. With over 325 delicious and healthy recipes, The Complete Idiot's Guide® to the Glycemic Index Cookbook is an invaluable reference for choosing...

The Complete Idiot's Guide to Managing Diabetes Fast-Track

By Joan Clark Warner MS RD CDE

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The rapid emergence of Type 2 diabetes has become one of the most urgent health issues facing not only Americans, but people around the globe. For those suffering from diabetes, managing the diseas...

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.