Ronald Kessler Books

In the President's Secret Service: Behind the Scenes with Agents in the Line of Fire and the Presidents They Protect

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Because Secret Service agents are sworn to secrecy, the American public rarely knows what presidents, vice presidents, presidential candidates, and Cabinet officers and their families are really li...

In the President's Secret Service

By Ronald Kessler

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After conducting exclusive interviews with more than one hundred current and former Secret Service agents, bestselling author and award-winning reporter Ronald Kessler reveals their secrets for t...

Spy Vs Spy Shocking True Story Fbi s Secret War Spy Vs Spy

By Ronald Kessler, Kessler

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Spy vs. Spy

By Ronald Kessler, Kessler

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The FBI

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Inside Congress

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Inside the CIA

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The Bureau

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Paradise Salvage

By John Fusco

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The First Family Detail

By Ronald Kessler

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NEW YORK TIMES BESTSELLER  • “Ron Kessler appears to get everything first.”—Slate As in a play, presidents, vice presidents, and presidential candidates perform ons...

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.