Roger J. Lederer Books

Amazing birds

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This beautifully illustrated book is a treasury of facts and information about the avian world. Aimed squarely at non-specialists, it will appeal to birders and non-birders alike. It is an ideal gi...

Amazing Birds

By Roger Lederer Ph.D.

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Ecology and field biology

By Roger J. Lederer

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Fabuleux oiseaux

By Roger J. Lederer

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Pacific Coast Bird Finder

By Roger J. Lederer

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Beaks bones and bird songs

By Roger J. Lederer

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Birds of New England

By Jim Zipp, Jim Roetzel, Roger J. Lederer

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Explore the fascinating variety of birds that live in the backyards, forests, and beaches of this relatively small area of the country called New England.

Incroyables oiseaux

By Roger Lederer

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Art of the Bird

By Roger J. Lederer

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Birds

By Roger J. Lederer

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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.