Robert O. Greer Books

The Devil s Backbone

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"CJ Floyd, the streetwise, Denver-based bail bondsman and Vietnam vet, investigates the death of a rodeo star, unearthing a trail of land and diamond mining deals and greed that points to the mount...

Isolation, and other stories

By Robert O. Greer

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Tumors of the Head and Neck in Children

By Robert O. Greer, Blaise Favara, Gary W. Mierau

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Pediatric Head and Neck Pathology

By Sherif Said, Robert E. Marx, Lori D. Prok, Robert O. Greer

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Pediatric Head and Neck Pathology

By Sherif Said, Robert E. Marx, Lori D. Prok, Robert O. Greer

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Pediatric Head and Neck Pathology

By Sherif Said, Robert E. Marx, Lori D. Prok, Robert O. Greer

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Spoon

By Robert O. Greer

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Astride a pink horse

By Robert O. Greer

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"This gripping thriller about deceit, revenge, and broken government promises starts with a veteran's murder and takes us back to the horrors of World War II and the dawn of the atomic age"--Provid...

Resurrecting Langston Blue

By Robert O. Greer

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"A political thriller featuring streetwise, Denver-based bail bondsman CJ Floyd, a host of other engaging and intriguing characters, non-stop action, and fast-paced dialogue"--Provided by publisher.

Blackbird farewell

By Robert O. Greer

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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.