David Oliver Relin Books

Second Suns

By Geoffrey Tabin, Paul Farmer, David Oliver Relin

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Second Suns: Two Doctors and Their Amazing Quest to Restore Sight and Save Lives

By David Oliver Relin

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From the co-author of Three Cups of Tea comes the inspiring story of two very different doctors—one from the United States, the other from Nepal—united in a common mission: to rid the world of prev...

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.