Helen Lester Books

Score One for the Sloths

By Lynn Munsinger, Helen Lester

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Hurty Feelings

By Helen Lester, Lester Helen.

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It looks like trouble when Fragility, a hippopotamus whose feelings are easily hurt, meets Rudy, a rude elephant, on the soccer field.

Tacky and the Winter Games

By Lester Helen.

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Tacky and his fellow penguins on Team Nice Icy Land train hard for the Winter Games, but Tacky's antics make their chances of winning a medal seem slim.

LA Mochila De Lin Dejame Leer Nivel 2

By Helen Lester

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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.