John J. Reiss Books

SHAPES

By John J. Reiss, Reiss

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Colors

By John J. Reiss

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Eight colors are represented in illustrations of animals, foods, insects, and flowers.

Numbers

By John J. Reiss

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Pictures of familiar objects introduce the numbers one through one thousand.

Numbers

By John J. Reiss

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In this counting book a starfish with five arms illustrates the number five, eight reindeer the figure eight, eighteen crayons the number eighteen, and so on.

Shapes

By John J. Reiss, Reiss

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Introduces common shapes such as squares and circles and demonstrates how they can easily be transformed into other forms.

Colors

By John J. Reiss

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Formes

By John J. Reiss

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Colors

By John J. Reiss

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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.