Carl Sewell Books

The golden rules of customer care

By Carl Sewell

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The golden rules of customer care

By Carl Sewell

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Kunden furs Leben

By Paul B. Brown, Hans Klink

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In this completely revised and updated edition of the customer service classic, Carl Sewell enhances his time-tested advice with fresh ideas and new examples and explains how the groundbreaking “Te...

Customers For Life

By Paul B. Brown, Carl Sewell

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In this completely revised and updated edition of the customer service classic (more than 600,000 copies sold), Carl Sewell enhances his time-tested advice with fresh ideas and new examples and exp...

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.