William Sheehan Books

The Immortal Fire Within: The Life and Work of Edward Emerson Barnard

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This, the first full-length biography of Edward Emerson Barnard, tells the remarkable tale of endurance and achievement of one of the leading astronomers of the late nineteenth and early twentieth...

The Western front

By William Sheehan

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Fighting for Dublin

By WILLIAM SHEEHAN

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Riotous assemblies

By Maura Cronin, William Sheehan

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Hearts mines

By William Sheehan

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Worlds in the Sky: Planetary Discovery From the Earliest Times through Voyager & Magellan

By William Sheehan

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The Planet Mars: A History of Observation and Discovery

By Jim Bell, Sheehan William, William Sheehan

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In this timely and vividly written account, William Sheehan traces human fascination with Mars back to the naked-eye observers of the planet. He recalls the early telescopic observers who first mad...

The Planet Mars: A History of Observation and Discovery

By William Sheehan

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Northern Arizona Space Training

By William Sheehan, Kevin Schindler

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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.