Hal Marcovitz Books

Robin Williams

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A biography that examines the personal life and professional career of comedian and Oscar-winning actor, Robin Williams.

Robin Williams

By Hal Marcovitz

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A biography that examines the personal life and professional career of comedian and Oscar-winning actor, Robin Williams.

Marco Polo and the wonders of the East

By Hal Marcovitz

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A biography of the Italian traveler who became the first European to cross Asia completely and document his experiences.

Francisco Coronado and the exploration of the American Southwest

By Hal Marcovitz

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A biography of the conquistador whose quest for the Seven Cities of Gold led to the exploration of the American Southwest in 1540.

Sacagawea

By Hal Marcovitz

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Reaching for the Moon

By Hal Marcovitz

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Sacagawea

By Hal Marcovitz

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Al Sharpton

By Hal Marcovitz

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The life and achievements of Al Sharpton, minister, civil rights activist, and politician.

Al Sharpton

By Hal Marcovitz

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The life and achievements of Al Sharpton, minister, civil rights activist, and politician.

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.