Gerry Bailey Books

"Leo teaches his cat Pallas all about lines by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts. Leo exp...

Stone age geometry

By Gerry Bailey

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"Leo teaches his cat Pallas all about spheres by applying his knowledge of geometry to their Stone Age world. Entertaining illustrations and stories provide a fun introduction to math concepts, inc...

Squares

By Gerry Bailey

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Ankylosaurus

By Gerry Bailey

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This book tells the story of Ankylosaurus. This armored beast looked like a walking tank. It lived during the Cretaceous period between 100 and 65 million years ago and fed on plant material. At th...

Apatosaurus

By Gerry Bailey

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Realistic illustrations highlight this story about a day in the life of the enormous Apatosaurus. Created in collaboration with the Smithsonian Institution, information sections give all the vital...

Parasaurolophus

By Gerry Bailey

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Realistic illustrations highlight this story about a day in the life of the Parasaurolophus. Created in collaboration with the Smithsonian Institution, information sections give all the vital stati...

Pteranodon

By Gerry Bailey

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This book tells the story of Pteranodon. During the late Cretaceous period, between 89 and 80 million years ago, one of the largest flying reptiles to exist flew in the skies. Its large wingspan an...

Sabre tooth tiger

By Gerry Bailey

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Realistic illustrations highlight this story about a day in the life of the powerfully built sabre-tooth tiger. Created in collaboration with the Smithsonian Institution, information sections give...

Triceratops

By Gerry Bailey

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Realistic illustrations highlight this story about a day in the life of Triceratops, a dinosaur that was heavier than a present day elephant. Created in collaboration with the Smithsonian Instituti...

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.