Penny Olsen Books

Falken und Habichte

By Penny Olsen

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Describes the physical characteristics and behavior of various kinds of falcons and hawks around the world.

Birds of Prey and Ground Birds of Australia

By Nancy Olsen, The Australian Museum, Penny Olsen

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Robert David Fitzgerald was a successful colonial surveyor who had arrived in Australia in 1856 as a young Irish immigrant of 25. He was employed by the Lands Department in New South Wales and, alt...

An eye for nature

By Penny Olsen

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Feather and Brush

By Penny Olsen

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Wedge Tailed Eagle Australian Natural History

By Penny Olsen

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Wedge tailed eagle

By Penny Olsen

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Australian birds of prey

By Penny Olsen

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The extraordinary wildlife of Australia has long held a special fascination for people throughout the world. Now international authority Penny Olsen offers the definitive work on Australia's specta...

Falcons and hawks

By Penny Olsen

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Describes the physical characteristics and behavior of various kinds of falcons and hawks around the world.

Birds of prey

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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.