Patrick Merrell Books

Punchline Puzzles

By Patrick Merrell

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Maze halloween

By Patrick Merrell

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Mery Christmas mazes

By Patrick Merrell

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Pipsqueaks! Maze School: A Book Of Beginning Mazes

By Patrick Merrell, Merrell, Patrick

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The Pipsqueaks are going to school! In this engaging book of beginning mazes, help the Pipsqueaks... Find their classroom! Travel through a city of blocks! See which class pet wins the big race! Al...

Curious George Saves the Day

By Nancy E. Krulik

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Maze Day

By Patrick Merrell

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512 Ants on Sullivan Street

By Patrick Merrell, Carol A. Losi

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The 512 Ants on Sullivan Street

By Marilyn Burns, Patrick Merrell, Carol A. Losi

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Maze Mania

By Patrick Merrell

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Monster Mazes

By Patrick Merrell

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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.