Robert C. O Brien Books

Mrs. Frisby and the Rats of NIMH

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This edition of Mrs. Frisby and the Rats of NIMH "was published by special arrangement with Atheneum Publishers, an imprint of Macmillan Publishing company."

Mrs. Frisby and the Rats of NIMH.

By Robert C. O Brien

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A Report from Group 17

By Robert C. O Brien

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Mrs. Frisby and the Rats of Nimh

By Robert C. O Brien

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Mrs. Frisby and the Rats of NIMH

By Robert C. O Brien

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New Windmills

By Robert C. O Brien

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New Windmills

By Robert C. O Brien

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Z. for Zachariah

By Robert C. O Brien, Peter Hodson

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A Report from Group 17

By Robert C. O Brien

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Mrs Frisby and the rats of Nimh

By Robert C. O Brien

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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.