Christopher A Perrin Books

Latin For Children, Primer C

By Erin Davis, Christopher Perrin, Karen Moore, Aaron Larsen, Aaron Larson, Robby Baddorf, Christopher A Perrin

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The Latin for Children Primer C is the third and final text in the LFC series. Grammar training continues, and students are encouraged to do more reading in Latin by following along with a running...

Latin for Children Primer C Answer Key

By Larsen Aaron Perrin Christopher

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Introduction to Classical Education

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Greek For Children

By Christopher Perrin, Christopher A Perrin, Christopher, Ph.D. Perrin

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An understandable, engaging, and creative program, Greek for Children, Primer A will introduce your students to Koine Greek, the ancient language of the New Testament. This text has been designed t...

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.