Ellen Ullman Books

In 1984, Roberta Watson, a quality assurance tester with a computer start-up company, and Ethan Levin, a computer programmer, try to find the bug which is infecting their company's new software bef...

The Bug

By Ellen Ullman

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Life in Code

By Ellen Ullman

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By Blood

By Ellen Ullman, Malcolm Hillgartner

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Power of Us

By Ellen Ullman, Dr. Matthew X. Joseph

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By blood

By Ellen Ullman

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This is a gothic noir novel that explores questions about fate, identity, and genetics in the guide of a gripping psychological thriller.

Close to the Machine

By Ellen Ullman

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By blood

By Ellen Ullman

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This is a gothic noir novel that explores questions about fate, identity, and genetics in the guide of a gripping psychological thriller.

Life in Code

By Ellen Ullman

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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.