Paul Ruggieri Books

Why is surgery so expensive? Surgeon Paul A. Ruggieri reveals little-known truths about his profession—and the hidden flaws of our healthcare system—in this compelling and troubling account of real...

Confessions of a Surgeon

By Paul Ruggieri

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As an active surgeon and former department chairman, Dr. Paul A. Ruggieri has seen the good, the bad, and the ugly of his profession. In Confessions of a Surgeon, he pushes open the doors of the O....

Colon rectal cancer

By Paul Ruggieri

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"This handy, reassuring guide helps recently diagnosed patients answer pressing questions, such as How far advanced is the disease? What tests are involved? and What treatments will be recommended?...

Colon and Rectal Cancer

By Addison R. Tolentino, Paul Ruggieri

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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.