Fred Schaaf Books

Comet of the Century: From Halley to Hale-Bopp

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The twentieth century has been less spectacular for comets than the nineteenth century, but the object now approaching, Comet Hale-Bopp, bears a striking resemblance to the Great Comet of 1811, the...

Seeing the sky

By Fred Schaaf

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The Starry Room

By Fred Schaaf

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Seeing the solar system

By Fred Schaaf

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Seeing the solar system

By Fred Schaaf

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The starry room

By Fred Schaaf

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The Brightest Stars

By Fred Schaaf

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Wonders of the Sky

By Fred Schaaf

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The Starry Room

By Fred Schaaf

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The amateur astronomer

By Fred Schaaf

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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.