Randy KAUFMAN Books

Dr. Paul Wolff & Tritschler: Light And Shadow – Photographs From 1920 To 1950

By Randy KAUFMAN, Sabine-Hock, Tobias Picard, Günter Osterloh, Paul Wolff, Hans-Michael Koetzle, Gerald Piffl, Kristina Lemke

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Around 1930, the trained physician and self-taught photographer Dr. Paul Wolff (1887-1951) was among the most successful German photographers. He positioned himself at an early stage as a pioneer o...

Art Book

By Randy KAUFMAN

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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.