Konstantin Totev Books

Vizantiiski steatitovi ikoni ot Bulgariia

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The book is dedicated to a small part of Byzantinie applied art, steatite sculpting. This soft stone, known since antiquity, enables masters and workshops in the Byzantine capital Constantinople to...

Arkheologicheski prouchvaniia na srednovekovniia grad Trapezitsa Sektor Sever

By Konstantin Totev

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Vizantiisko izkustvo

By Konstantin Totev

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Tomichoviiat psaltir v Bulgariia

By Krustiu Chukalev, Atanaska Miteva, Konstantin Totev, Galina Grozdanova, Margarit Damianov, Tatiana Stefanova, Aksiniia Dzhurova, Vladimir Manchev

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Srednovekovno Turnovo

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Zlatni prusteni pechati ot vremeto na Vtoroto bulgarsko tsarstvo 1185 1396

By Konstantin Totev

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Thessalonican eulogia found in Bulgaria

By Konstantin Totev

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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.