John Montroll Books

Origami Fold By Fold

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A unique collection of 35 original origami models, presented in order of difficulty, is the invention of bestselling origami artist John Montroll. The projects start with simple one-star models (la...

Origami, American style

By John Montroll

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Animal Origami for the Enthusiast

By John Montroll

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Challenging new collection of paper sculptures designed by renowned origami expert presents 25 intricately detailed paperfolding projects featuring strikingly life-like animals ― angelfish, walrus,...

Fun and Simple Origami

By John Montroll

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Galaxy of Origami Stars

By John Montroll

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North American Animals in Origami

By Fumiaki Kawahata, John Montroll

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Wonder Woman origami

By John Montroll

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"Provides instructions and diagrams for folding origami models of characters, objects, and symbols related to Wonder Woman"--

Justice League origami

By John Montroll

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"Provides instructions and diagrams for folding origami models of characters, objects, and symbols related to the Justice League"--

Origami Sea Life

By Robert J. Lang, John Montroll

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Prehistoric Origami

By John Montroll

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Provides illustrated instructions to create origami dinosaur replicas, including the Tyrannosaurus, the Stegosaurus, the Pterodactylus, the Triceratops, the Apatosaurus, and others. This revised ed...

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.