Penny Olsen Books

A botanical life

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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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Birds of Prey

By Ian Dr. Editor Newton

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Birds of prey

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Is There Anyone Out There

By Helen Sim

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The best nest

By Penny Olsen

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Collecting ladies

By Penny Olsen

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Around 1870 Ferdinand von Mueller, the greatest Australian botanist of the nineteenth century, began to advertise in several newspapers across Australia for lady plant collectors.

Cayley son

By Penny Olsen

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Stray feathers

By Penny Olsen

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Stray feathers

By Penny Olsen

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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.