Philip Unitt Books

Birds of the Salton Sea

By Philip Unitt, Michael A. Patten, Guy McCaskie

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"The Salton Sea, California's largest inland lake, supports a spectacular bird population that is among the most concentrated and diverse in the world. This book is the first thoroughly detailed bo...

San Diego County Mammal Atlas

By San Diego Natural History Museum, Howard Thomas, Jay Diffendorfer, Drew Stokes, Wayne Spencer, Philip Unitt, Susan Chivers, Scott Tremor

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San Diego County Bird Atlas

By Philip Unitt

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Birds of the Salton Sea

By Philip Unitt, Guy McCaskie, Michael Patten

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Birds of the Salton Sea

By Philip Unitt, Michael A. Patten, Guy McCaskie

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Birds of San Diego County

By Philip Unitt

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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.