Jon Solomon Books

Ptolemy Harmonics

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The study of classical culture flourished for well over two thousand years before the computer age, but in the past three decades the computer has given classical scholarship its most productive to...

Ancient Roman feasts and recipes adapted for modern cooking

By Jon Solomon

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Background details on dining in antiquity and Roman foods and orgies prefaces authentic ancient recipes for pastries, sweet and sour sauces, breads, salads, soups, fish and shellfish, meats, vegeta...

The Classical Tradition: Romantic to Modern

By Jon Solomon

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Classical Mythology

By Jon Solomon

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Classical Mythology

By Jon Solomon

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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.