Spencer Mark Books

Love and reruns in Adams County

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In 1985, Lon Peterson returns to West Union, Ohio, after failing out of the minor leagues. His ex-wife, ex-cheerleader Pamela, has already come back to town and launched her career at McDonald's. H...

Wedlock

By Spencer Mark

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The weary motel

By Spencer Mark

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Motion 5

By Spencer Mark

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A haunted love story

By Spencer Mark

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The masked demon

By Spencer Mark

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Trespassers

By Spencer Mark

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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.