Judy Mandell Books

What to Expect in Your Fifties

By Judy Mandell

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Book editors talk to writers

By Judy Mandell

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Magazine editors talk to writers

By Judy Mandell

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Based on incisive interviews with editors from such leading publications as Esquire, Parade, Field & Stream, American Baby, and Ladies' Home Journal, this indispensable book gives you all the infor...

Writer s Guide to Magazine Editors and Publishers 1997 1998

By Judy Mandell

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Magazine Writers Nonfiction Guidelines

By Judy Mandell

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Fiction writers guidelines

By Judy Mandell

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The one hour college applicant

By Lois Rochester

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Fiction writers guidelines

By Judy Mandell

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Golden Opportunities

By Judy Mandell

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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.