Richard A. Lertzman Books

Deconstructing The Rat Pack

By Lon Davis, Richard A. Lertzman

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The life and times of Mickey Rooney

By William J. Birnes

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"A definitive biography of the iconic actor and Hollywood legend Mickey Rooney (1920-2014) and his extravagant, sometimes tawdry life, drawing on never-before-seen excerpts from Rooney's diary and...

The Life and Times of Mickey Rooney

By Richard A. Lertzman, William Birnes, Pete Cross

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Dr. Feelgood

By Richard A. Lertzman

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Doctor Max Jacobson, whom the Secret Service under President John F. Kennedy code-named "Dr. Feelgood," developed a unique "energy formula" that altered the paths of some of the twentieth-century's...

Dr. Feelgood

By Richard A. Lertzman

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Anything to declare?

By Jon Frost

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In more than twenty years, Jon Frost has worked with the mad, the bad, the brave, the stupid, the spectacular and the heroic. In his time as a uniformed officer Jon seized presidential aircraft, a...

Life and Times of Mickey Rooney

By Richard A. Lertzman, William J. Birnes

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Life and Times of Mickey Rooney

By Richard A. Lertzman, William J. Birnes

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Beyond Columbo

By Richard A. Lertzman, William J. Birnes

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Dr. Feelgood

By Richard A. Lertzman, William J. Birnes

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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.