Tim Proetel Books

Figure drawing methods for artists

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Simple methods teach how to draw figures. When we try to draw a person, we are quickly confronted with various challenges. The proportions need to be correct, the attitude must be clear and vivid,...

Drawing Perspective Methods for Artists

By Peter Boerboom, Tim Proetel

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Figure Drawing Methods for Artists

By Peter Boerboom, Tim Proetel

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Figure Drawing Methods for Artists

By Peter Boerboom, Tim Proetel

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Light

By Peter Boerboom, Tim Proetel

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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.