John Samuel Hilbert Books

The tragic life and short chess career of James A. Leonard, 1841-1862

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"This biography discusses what little is known of Leonard's life and death but concentrates primarily on Leonard's ability and his sadly shortened career. Diagrams from more than 90 of Leonard's ga...

Napier

By John Samuel Hilbert

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Shady side

By John Samuel Hilbert

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Essays in American chess history

By John Samuel Hilbert

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The United States Chess Championship

By John Samuel Hilbert

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New York 1936

By John Samuel Hilbert

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The New York State Chess Association congresses

By John Samuel Hilbert

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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.