Jonathan Betts Books

Time Restored: The Harrison timekeepers and R.T. Gould, the man who knew (almost) everything

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This is the biography of the polymath, R.T. Gould, the man who in the 1920s, restored the great 18th century marine timekeepers by John Harrison to their former glory. With his encyclopaedic knowle...

The National Trust pocket guide to clocks

By Jonathan Betts

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Harrison

By Jonathan Betts

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HARRISON

By Jonathan Betts

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Harrison Decoded

By Rory McEvoy, Jonathan Betts

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General History of Horology

By James Nye, Jonathan Betts, Anthony Turner

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Time Restored

By Jonathan Betts

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Time Restored: The Harrison timekeepers and R.T. Gould, the man who knew (almost) everything

By Jonathan Betts

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Marine Chronometers at Greenwich: A Catalogue of Marine Chronometers at the National Maritime Museum, Greenwich

By Jonathan Betts

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Harrison Decoded: Towards A Perfect Pendulum Clock

By Rory McEvoy, Jonathan Betts

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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.