Dorothy Leon Books

The secret world of underground creatures

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Describes the characteristics and habits of animals who spend much of their life underground. Includes harvester ants, rubber boas, kingfishers, and kangaroo rats.

Beyond the Follies of Fundamentalism

By Dorothy Leon

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One eye, two eyes, three eyes, four ... the many ways animals see

By Dorothy Leon

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Discusses the eyes that have evolved in various animals over the centuries, their use, kinds of sight, and unusual eyes.

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.