Hal Marcovitz Books

Kellie Pickler

By Hal Marcovitz

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Life of Kellie Pickler, a country music singer who first made her mark on the television show American idol.

Hispanic celebrities in America

By Hal Marcovitz

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People of Hispanic descent have made significant contributions in music, cuisine, literature, politics, sports, business, science, tecnology, & many oter fields. Inside this book you'll fund a shor...

Exposing torture

By Hal Marcovitz

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Designer Drugs

By Hal Marcovitz

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Fake News and Media Bias

By Lucian Vance, Hal Marcovitz

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Anime Eye on Art

By Hal Marcovitz

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John Adams

By Hal Marcovitz

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A biography of the second president of the United States, focusing on his childhood and young adulthood.

John F. Kennedy

By Hal Marcovitz

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A biography of the thirty-fifth president of the United States, focusing on his childhood and young adulthood.

Bill Clinton

By Hal Marcovitz

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A biography of the forty-second president of the United States, focusing on his childhood and youth.

James Monroe

By Hal Marcovitz

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A biography of the fifth president of the United States, focusing on his childhood and young adulthood.

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.