Albert J. Elen Books

Missing Old Master drawings from the Franz Koenigs collection

By Albert J. Elen

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Rembrandt in Rotterdam

By Albert J. Elen, Rembrandt Harmenszoon Van Rijn

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An Eyckian crucifixion explored

By Friso Lammertse, Albert J. Elen

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In 2012 a hitherto unknown 'Eyckian' drawing of the Crucifixion was exhibited in The Road to Van Eyck in Museum Boijmans Van Beuningen. Forty years earlier Wim Hofman, a psychiatrist and art collec...

Fra Bartolommeo

By Chris Fischer, Bram De Klerck, Michael W. Kwakkelstein, Albert J. Elen

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In Museum Boijmans Van Beuningen, discover the masterpieces of Fra Bartolommeo (1473-1517), the Italian monk and artist from the famous monastery of San Marco in Florence. He, Leonardo da Vinci, Ra...

German master drawings from the Koenigs collection

By Albert J. Elen

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Italian Late-Medieval and Renaissance Drawing-Books

By Albert J. Elen

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For book reviews of this standard work on drawing-books, see the following periodicals: The Burlington Magazine, July 1996, pp. 469-470 Apollo,October 1996, p. 59 Master Drawings 38/1 (2000), p. 78

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.