Grant Blackwood Books

Spartan Gold

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In this adventure in the #1 New York Times bestselling series, husband-and-wife treasure hunters Sam and Remi Fargo must out-pace a self-made millionaire in pursuit of an incredible fortune......

Tom Clancy Duty and Honor

By Grant Blackwood

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Jack Ryan Jr. is caught in the cross-hairs of a would-be tyrant in this exhilarating thriller in Tom Clancy's #1 New York Times bestselling series.Jack Ryan, Jr., is on his own. He's been oust...

Tom Clancy s under Fire

By Grant Blackwood

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Tom Clancy s Duty and Honour

By Grant Blackwood

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Tom Clancy s Duty and Honour

By Grant Blackwood

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392 pages ; 20 cm

Tom Clancy s Duty and Honour

By Grant Blackwood

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War Hawk

By James Rollins

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Kill Switch

By James Rollins, Grant Blackwood

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Kill Switch

By James Rollins, Grant Blackwood

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Kill Switch

By James Rollins, Grant Blackwood

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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.