Martin Postle Books

Sir Joshua Reynolds: The Subject Pictures

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Sir Joshua Reynolds's subject pictures were among the most widely discussed British paintings of the eighteenth century. Today Reynolds's reputation rests principally on his portraits, his theoreti...

Thomas Gainsborough British Artists

By Martin Postle

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"Thomas Gainsborough (1727-1788) is the most perennially popular of British artists, admired for the grandeur of his society portraits and his sumptuous pastoral landscapes. In his life and his art...

PICTURES OF INNOCENCE: PORTRAITS OF CHILDREN FROM HOGARTH TO LAWRENCE.

By Amina Wright

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Lord Leighton 1830 1896 and Leighton House A Centenary Celebration

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Thomas Gainsborough

By Martin Postle

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Art of the Garden

By Martin Postle, Stephen Daniels, Nicholas Alfrey

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Joshua Reynolds

By Martin Postle, Sir Joshua Reynolds

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The artist's model from Etty to Spencer

By Martin Postle

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The artist's model from Etty to Spencer

By Martin Postle

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Angels & urchins

By Martin Postle

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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.