Gretchen Reynolds Books

The First 20 Minutes

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The New York Times bestseller that explains how groundbreaking scientific discoveries can help each of us achieve our personal bestEvery week, Gretchen Reynolds single-handedly influences how milli...

Master Players

By Elizabeth Jones, Gretchen Reynolds

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Master Players

By Elizabeth Jones, Gretchen Reynolds

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The first 20 minutes

By Gretchen Reynolds

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Gretchen Reynolds explains how exercise affects the body in distinct ways and provides the tools readers need to achieve their fitness goals - whether that's a faster 5K or staying trim.

The play s the thing

By Elizabeth Jones

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"Responding to current debates on the place of play in schools, the authors have extensively revised their groundbreaking book. They explain how and why play is a critical part of children's develo...

The first 20 minutes

By Gretchen Reynolds

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First 20 Minutes

By Gretchen Reynolds

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First 20 Minutes

By Gretchen Reynolds

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First Twenty Minutes Personal Trainer

By Gretchen Reynolds

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The Play's the Thing: Teachers' Roles in Children's Play

By Gretchen Reynolds, Elizabeth Jones

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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.