Marina Druzhinina Books

Zanimaius matematikoi

By Marina Druzhinina

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Veselyi schet do 100

By Marina Druzhinina

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Khorosho byt optimistom

By Marina Druzhinina

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"Marina Druzhinina - izvestnaya sovremennaya pisatel'nitsa, avtor mnogikh zamechatel'nykh proizvedeniy dlya detey. Yeye stikhi i rasskazy pol'zuyutsya ogromnoy populyarnost'yu u chitateley. V knigu...

Uchimsia sravnivat

By Marina Druzhinina

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Childrens poetry. Designed to teach toddlers how to compare different things: shapes, sizes, dimensions, etc.

Vezhlivye slova

By Marina Druzhinina

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Children's poetry teaching toddlers good manners and social behaviour.

Moi dom

By Marina Druzhinina

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Colorfully illustrated rhymes, games, and riddles.

Moia ulitsa

By Marina Druzhinina

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A collection of puzzles, rhymes, and riddles for children about the streets they live on.

Kakie byvaiut formy

By Marina Druzhinina

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Childrens poetry. Designed to teach shapes to toddlers as they learn about circle, square, triangle, and many others.

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.