Derek Howse Books

The Sea Chart: An Historical Survey based on the Collections in the National Maritime Museum

By Derek Howse

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Greenwich Time and the Discovery of the Longitude

By Derek Howse

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Traces the astronomical, navigational, and timekeeping advances that led to the development of Greenwich time, the concept of longitude, and the designation of Greenwich as the prime meridian.

Radar at Sea: Royal Navy in World War 2

By Derek Howse

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Nevil Maskelyne: The Seaman's Astronomer

By DEREK HOWSE

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The Correspondence of John Flamsteed The First Astronomer Royal

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Five Hundred Years of Nautical Science 1400 1900

By International Reunion For The History Of Nautical Science And Hydrography 3rd 1979 National Maritime Museum, Derek Howse

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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.