Thomas Michael Gunther Books

Francois Tuefferd, chasseur d'images

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Eugene Atget

By Marsha Sirven, Guillaume Le Gall, Francoise Reynaud, Geoff Dyer, Frits Gierstberg, Carlos Gollonet, Anne Cartier Bresson, Thomas Michael Gunther

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Paris before it is too late

By Thomas Michael Gunther

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"Paris, Before it is Too Late is a curated selection of 60 vintage photographs by the French photographer André Ostier. Spanning the career of Ostier from his days in Paris during World War II to t...

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.