Kathleen M. Lesko Books

Black Georgetown Remembered

By Valerie Babb, Carroll R. Gibbs, Kathleen M. Lesko

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Jeanne Devereaux prima ballerina of Vaudeville and Broadway

By Kathleen M. Lesko

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"Born Jean Helman, she entered showbiz as a dancing trouper performing in palatial theaters and was one of the last vaudevillians surviving into the 2010s. In her later years living in Pasadena, Ca...

Jeanne Devereaux Prima Ballerina of Vaudeville and Broadway

By Kathleen Menzie Lesko

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Black Georgetown remembered

By Kathleen M. Lesko

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Black Georgetown remembered

By Kathleen M. Lesko

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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.