Peter Spiegelman Books

Thick as Thieves

By Megan Whalen Turner

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No Way Home

By Peter Spiegelman

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Black Maps

By Peter Spiegelman

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Red Cat

By Peter Spiegelman

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Private detective John March comes to the aid of his brother, David, who is being stalked by a woman he met on the Internet and with whom he enjoyed a few brief but torrid encounters, and who is th...

Dr. Knox: A novel

By Peter Spiegelman

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Black Maps

By Peter Spiegelman

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Black Maps John March Mysteries

By Peter Spiegelman

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Death s Little Helpers John March Mysteries

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Death s Little Helpers John March Mysteries

By Peter Spiegelman

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Black Maps

By Peter Spiegelman

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John March walked away from his family’s merchant bank for the life of a rural deputy sheriff–a life that would explode in personal tragedy and professional disaster. Three years later,...

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.