Doug Dubosque Books

Introduces techniques and exercises for rendering the basic three-dimensional forms essential for realistic drawing: the cylinder, cone, sphere, and box.

Learn to draw 3-D

By D. C. DuBosque

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Provides instructions for making one-point and two-point perspective drawings.

Draw! cars

By D. C. DuBosque

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Presents step-by-step instructions for drawing basic cars and different models, such as the Lamborghini, Ferrari, and Volkswagen.

Draw Dinosaurs Draw

By Doug Dubosque, D. C. DuBosque

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Provides step-by-step instructions for drawing dinosaurs one line at a time or for beginning with ovals, triangles, and solid forms.

Draw! rainforest animals

By D. C. DuBosque

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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.