Helen Langdon Books

Caravaggio

By Helen Langdon

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Transports: Travel, Pleasure, and Imaginative Geography, 1600-1830

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Caravaggio: A Life

By Helen Langdon

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"Of all the great Italian painters, Caravaggio speaks most clearly and powerfully to our time. Caravaggio's early paintings of cardsharps, musicians, and street vendors convey his familiarity and f...

The Simon and Schuster pocket art museum guide

By Helen Langdon

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Caravaggio

By Helen Langdon

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Caravaggio

By Helen Langdon

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Everyday-life painting

By Helen Langdon

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Claude Lorrain

By Helen Langdon

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Degas The Colour Library

By Keith Roberts

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Holbein

By Helen Langdon

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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.