Doug Henderson Books

Dinosaur Tree

By Doug Henderson

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Asteroid Impact

By Doug Henderson

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Maia

By Jeri D. Walton, John R. Horner, Doug Henderson

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A baby Duck-billed dinosaur living eighty million years ago on the North American continent, leaves her mother's nest, forages for food evades predators, mates, and produces a family of her own.

A search for the cure to heart disease leads to the discovery

By Douglas D. Henderson

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The Cleveland Heights LGBTQ Sci Fi and Fantasy Role Playing Club

By Doug Henderson

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Remote Control

By Doug Henderson

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Maia

By John R. Horner, James Gorman, Doug Henderson

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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.