Hellmut Hager Books

Carlo Fontana: The Drawings At Windsor Castle

By Allan Braham, John Harris, Alastair Laing, Hellmut Hager, Royal Library

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Projects And Monuments In The Period Of The Roman Baroque

By Hellmut Hager, Susan S. Munshower, Hellmut Hager And Susan Scott Munshower

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Preface -- Filippo Juvarra And The Accademia Di San Luca In Rome In The Early Eighteenth Century / Henry A. Milson -- The Concorso Accademico Of 1677 At The Accademia Di San Luca / Gil R. Smith --...

Light On The Eternal City: Observations And Discoveries In The Art And Architecture Of Rome

By Hellmut Hager, Helmut Hager, Hellmut Hager And Susan Scott Munshower

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Papal Artistic Commissions As Definitions Of The Medieval Church In Rome / Hans Belting -- Nicholas V And The Rebuilding Of Rome / Charles R. Mack -- Leonardo, Raphael, And Caravaggio / Richard E....

Loyola

By Hellmut Hager, Juan Carlos Eguillor, J. R. Eguillor, Rafael María De Hornedo

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Die Anfange Des Italienischen Altarbildes

By Hellmut Hager

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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.