Colin Threadgall Books

Animal families

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Labeled illustrations present the appropriate names for groups of different animals, including a gaggle of geese, a herd of cows, and a pride of lions.

Proud rooster and the fox

By Colin Threadgall

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A wily fox makes several attempts to steal the hens from a very vain rooster.

Proud rooster and the fox

By Colin Threadgall

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A wily fox makes several attempts to steal the hens from a very vain rooster.

Dinosaur fright

By Colin Threadgall

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When bullying brachiosaurs invade the territory of smaller dinosaurs, a little nanosaur devises a clever plan.

Dinosaur fright

By Colin Threadgall

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When bullying brachiosaurs invade the territory of smaller dinosaurs, a little nanosaur devises a clever plan.

Dinosaur fright

By Colin Threadgall

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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.