Lulu Delacre Books

Alicia Afterimage Alicia Afterimage

By Lulu Delacre

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Time for school, Nathan!

By Lulu Delacre

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Nathan the elephant triumphs on his first day of school when he learns how to divide his attention between school and his jealous best friend, Nicholas Alexander.

Rafi and Rosi

By Lulu Delacre

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Two tree frogs, mischievous Rafi and his younger sister Rosi, learn about the plants and animals of Puerto Rico together.

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.