António Castro Books

Barry: The Bravest St. Bernard

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This series of affordable paperbacks offers an appealing variety of fiction and nonfiction by such popular authors as Jean Marzollo, Joyce Milton, Richard Scarry, and Joanna Cole-all carefully gear...

Barry: The Bravest Saint Bernard (A Stepping Stone Book(TM))

By António Castro, Lynn Hall

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Illus. in full color. This is the true-life story of Barry, a remarkable Saint Bernard who gained worldwide fame for rescuing more than 40 people trapped under avalanches. From the Trade Paperback...

Barry

By António Castro, Lynn Hall

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Barry: The Bravest Saint Bernard

By António Castro, Lynn Hall

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Barry: The Bravest Saint Bernard

By António Castro, Lynn Hall

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Theodore Roosevelt

By Susan DeStefano, António Castro, Destefano

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80 pages : 23 cm Examines the life of President Theodore Roosevelt, emphasizing his love of nature and his efforts to protect the environment Includes index Lifelong career -- Ugly duckling -- Roos...

John Muir: At Home In The Wild

By Katherine S. Talmadge, António Castro

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80 pages : 23 cm A biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system Includes index Man of the wilderness -- Growing up -- Out in...

Friend Of The Earth

By Debby Anker, António Castro, Debby Anker And John De Graaf

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A biography of the author and conservationist who has been a key figure in such groups as Sierra Club and Friends of the Earth.

Margaret Murie:Wilderness

By Nelson Bryant, António Castro, Jennifer Bryant

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80 p. : 23 cm A biography of the conservationist, known as the "godmother" of the environmental movement, who grew up in the Alaska territory and became a major force behind the preservation of the...

The Life Of Elizabeth Blackwell

By António Castro, Elizabeth Schleichert

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80 p. : 23 cm Examines the life of the first female doctor in the United States, who worked to open the field of medicine to women Includes bibliographical references and index

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.