John Lacher Books

Excel Expert Solutions

By David Hager, John Green, Ron Person, David Bellamy, David Maguiness, Brian Underdahl, Conrad Carlberg, Donna Payne, Bob Umlas, John Lacher, Shane Devenshire, Heidi Sullivan-Liscomb, Iii Howard Willis E., Donna Payne, David Maguiness, John Green, Bob Umlas, David Hager, Shane Devenshire, Heidi Sullivan-Liscomb, John Lacher, Conrad Carlberg, Ron Person, Willis E., Iii Howard, David Bellamy, Brian Underdahl

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Que has gathered the top experts in the field to tackle high-level Excel topics and programming. With coverage of spreadsheets, external data manipulation, high-grade queries, forms, reports, and m...

Microsoft Office Expert Solutions

By Terry Allen, Sue Mosher, Susann Novalis, Sharon Podlin, Diane Tinney, Conrad George Carlberg, Kathy Ivens, Conrad Carlberg, Donna Payne, Brian Reilly, John Lacher, Susan Daffron, Shane Devenshire, Heidi Sullivan-Liscomb, Toni Messer

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Visual Basic for Applications Database Solutions

By John Lacher

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Building Integrated Office Applications

By William J. Orvis, Gordon Padwick, David Fullerton, Bob Dover, John Lacher, Lisa A. Bucki, Kim Demers, Stuart Kippelman

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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.