Thor Books

1 New York Times bestselling author Brad Thor brings readers his darkest and most intriguing thriller yet—a terrifying story of espionage and betrayal—brilliantly paced with superb nonstop action.B...

Act Of War: A Thriller, Signed Limited Edition

By Brad, Brad Thor, Thor

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"After a CIA agent mysteriously dies overseas, his top asset surfaces with a startling and terrifying claim. There's just one problem--no one knows if she can be trusted. But when six exchange stud...

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.

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

What is an EAN and How Does it Relate to an ISBN?