William Hoffer Books

Not Without My Daughter: The Harrowing True Story of a Mother's Courage

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In August 1984, Michigan housewife Betty Mahmoody accompanied her husband to his native Iran for a two-week vacation. To her horror, she found herself and her four-year-old daughter, Mahtob, virtua...

The Senator: My Ten Years With Ted Kennedy

By William Hoffer, Richard E. Burke

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Victor Six: The Saga of America's Youngest, Most Decorated Officer in Vietnam

By David Christian, Christian David, William Hoffer

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Not Without My Daughter

By Betty Mahmoody

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Imagine yourself alone and vulnerable, trapped by a husband you thought you trusted, and held prisoner in his native Iran; a land where women have no rights and Americans are despised. For one Amer...

Freefall

By William Hoffer

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Adams v. Texas

By Randall Dale Adams

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Betrayal: The Untold Story of the Kurt Waldheim Investigation and Cover-Up

By Eli Rosenbaum, William Hoffer, Eli M. Rosenbaum

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Senator: My Ten Years with Ted Kennedy

By Richard E. Burke

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Saved!

By William Hoffer

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SAVED

By William Hoffer

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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.