KATHERINE HALLIGAN Books

50 HISTORIAS DE MUJERES QUE CAMBIARON AL MUNDO

By KATHERINE HALLIGAN

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Sunday Funday: An Activity for Every Weekend of the Year

By Katherine Halligan Illustrated By Jesus Verona

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Perfect for gifting, this activity book features fifty-two seasonal activities that families and friends can enjoy together.Make every Sunday a fun day with an amazing activity to keep you busy eac...

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.