Gabriel Martin I Roig Books

Painting with Oil Beginner Art Guides

By Parramon S Editorial Team, Gabriel Martin I Roig

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Painting with watercolor

By Parramon S Editorial Team, Gabriel Martin I Roig

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Light and shadow in drawing

By Gabriel Martin I Roig, Parramon S Editorial Team

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Shows methods for rationalizing the shading in drawings and getting the most out of their representation. Studies shadows' correct relationship to light, how to draw them using the most common reso...

Painting light and shade

By Gabriel Martin I Roig

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Painting the human figure

By Gabriel Martin I Roig

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Drawing academy

By Gabriel Martin I Roig

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Color secrets

By Gabriel Martin I Roig

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"For the artist, colors are elements of a language that must be understood and controlled. This book will explain the basic principles of color and instruct you in color's many different applicatio...

Textures

By Gabriel Martin I Roig

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Styles in painting

By Gabriel Martin I Roig

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Drawing for the beginning artist

By Gabriel Martin I Roig

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Step-by-step techniques for the process of drawing light and shadow using graphite pencils and charcoal.

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.