Penelope Leach Books

Children First

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From the bestselling author of the classic Your Baby & Child comes "a book full of wisdom...written by one of the world's leading nurturers of parents (T. Berry Brazelton, M.D.). • "A call for...

The parents' A-Z

By Penelope Leach

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Baby and child

By Penelope Leach

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Baby and child

By Penelope Leach

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Children first

By Penelope Leach

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Your baby and child

By Penelope Leach

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The essential first year

By Penelope Leach

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New guide to pregnancy and parenting from Penelope Leach, including guidance on practical issues such as feeding, sleeping, and crying.

Why Speak Out Against Smacking

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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.