Bob Leszczak Books

Single Season Sitcoms of the 1980s

By Bob Leszczak

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Who Did It First Great Rhythm and Blues Cover Songs and Their Original Artists

By Bob Leszczak

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Encyclopedia of Pop Music Aliases 1950 2000

By Bob Leszczak

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Single season sitcoms of the 1990s

By Bob Leszczak

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"During the 'Must See TV' 1990s, Americans enjoyed such immensely popular sitcoms as Friends, Seinfeld, Home Improvement and The Drew Carey Show. Shows that did not make the ratings cut numbered in...

There Once Was a Show from Nantucket

By Bob Leszczak

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Single Season Sitcoms 1948 1979

By Bob Leszczak

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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.