John Loengard Books

On the occasion of Georgia O'Keeffe's 80th birthday in 1966, 'Life' magazine dispatched photographer John Loengard to her home in New Mexico to document a day in the life of the pioneering American...

Life photographers

By John Loengard

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"Eisenstaedt and colleagues like Carl Mydans, Andreas Feininger, Cornell Capa, Gordon Parks, Dmitri Kessel, and thirty-eight other Life photographers interviewed here were practicing journalism in...

Pictures under discussion

By John Loengard

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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.