Allen M. Hornblum Books

Against their will

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"The sad history of young children, especially institutionalized children, being used as cheap and available test subjects - the raw material for experimentation - started long before the atomic ag...

Sentenced to Science: One Black Man's Story of Imprisonment in America

By Allen M. Hornblum

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"Sentenced to Science" is a searing indictment of the criminal justice and medical communities that cavalierly used Philadelphia inmates as human guinea pigs for an array of unethical and dangerous...

Sentenced to Science: One Black Man's Story of Imprisonment in America

By Allen M. Hornblum

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The Invisible Harry Gold: The Man Who Gave the Soviets the Atom Bomb

By Allen M. Hornblum

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Acres of skin

By Allen M. Hornblum

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In this expose, Allen M. Hornblum tells the story of Philadelphia's Holmesburg Prison. From the early 1950s through the mid-1970s, Holmesburg's inmates were used, in exchange for a few dollars, as...

Philadelphia's City Hall

By Allen M. Hornblum

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American Colossus

By Allen M. Hornblum

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Acres of Skin Human Experiments at Holmesburg Prison

By Allen M. Hornblum

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Against Their Will

By Gregory J. Dober, Allen M. Hornblum, Judith L. Newman

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Confessions of a Second Story Man

By Allen M. Hornblum

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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.