Bogdan Enescu Books

Balkan Mathematical Olympiads

By Bogdan Enescu, Mircea Becheanu

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Mathematical Olympiad Treasures

By Robert A. Ellis

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Mathematical Olympiad Treasures

By Bogdan Enescu, Titu Andreescu

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Mathematical Olympiad treasures

By Titu Andreescu

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"I took great pleasure in reading Mathematical Olympiad Treasures, by Titu Andreescu and Bogdan Enescu. This book is the fruit of the prodigious activity of two well-known creators of mathematics p...

Mathematical Olympiad Treasures

By Bogdan Enescu, Titu Andreescu

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Mathematical Olympiad Treasures

By Bogdan Enescu, Titu Andreescu

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Twenty One Articles for Math Competitions and Enrichment

By Gabriel Dospinescu, Bogdan Enescu, Dorin Andrica, L. V. Georgiev, Titu Andreescu

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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.