Peggy Roalf Books

Circus

By Peggy Roalf

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An exploration of painting through 2000 years of art history focusing on paintings of the circus.

Horses

By Peggy Roalf

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An exploration of painting through 2000 years of art history, focusing on the portrayal of horses by various artists.

Children

By Peggy Roalf

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An exploration of painting through 2000 years of art history focusing on paintings of children.

Children

By Peggy Roalf, Roalf Peggy

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An exploration of painting through 2000 years of art history focusing on paintings of children.

Self-portraits

By Peggy Roalf

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An exploration of painting through 2000 years of art history, focusing on self-portraits by such artists as Leonardo da Vinci, Rembrandt, Gorky, and Picasso.

Self-portraits

By Peggy Roalf

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An exploration of painting through 2000 years of art history, focusing on self-portraits by such artists as Leonardo da Vinci, Rembrandt, Gorky, and Picasso.

Flowers

By Peggy Roalf

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Explores 2000 years of art history by looking at paintings of flowers by various artists.

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.