Wayne R. Petersen Books

National Audubon Society Pocket Guide to Songbirds and Familiar Backyard Birds: Eastern Region

By National Audubon Society, Wayne R. Petersen, Richard K. Walton

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A portable, comprehensive field guide--brimming with concise descriptions and stunning color photographs, and designed to fit into your back pocket--from the go-to reference source for over 18 mill...

Birds of Massachusetts

By Richard R. Veit

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Massachusetts Breeding Bird Atlas Natural History of New England Series

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Birds of New England

By Wayne R. Petersen, Roger Burrows

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Massachusetts Breeding Bird Atlas Natural History of New England Series

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American Birding Association Field Guide to Birds of Massachusetts

By Brian E. Small, Wayne R. Petersen

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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.