Helen Wells Books

The Case of the Dangerous Remedy

By Helen Wells

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Proceedings of the First International Symposium on the Decontamination of Nuclear Installations

By A. Cook, A. Catherall, Helen Wells

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Doctor Betty.

By Helen Wells

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Betty's desire to be a wife is second only to her desire to be a doctor, a situation causing her many agonizing decisions before she learns it is possible to blend marriage and medicine.

Cherry Ames Flight Nurse Cherry Ames Nurse Stories

By Helen Wells

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Cherry Ames Private Duty Nurse Cherry Ames Nurse Stories

By Helen Wells

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Cherry Ames Visiting Nurse Cherry Ames Nurse Stories

By Helen Wells

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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.