Robert C. O Brien Books

Mrs. Frisby and the Rats of Nimh Newbery Promo 99 Aladdin Fantasy

By Robert C. O Brien

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The Silver Crown

By Robert C. O Brien

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The silver crown

By Robert C. O Brien

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Soon after waking up on her tenth birthday to find a silver crown on her pillow, Ellen's house burns down, her parents disappear, and she is launched on an adventure involving a trek through the wo...

Mrs. Frisby and the Rats of Nimh Newbery Summer

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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Z for Zachariah

By Robert C. O Brien

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Z for Zachariah by Robert C. O Brien 2002 Hardcover

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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Z for Zachariah

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.