Genevieve Cogman Books

The Lost Plot

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After being commissioned to find a rare book, Librarian Irene and her assistant, Kai, head to Prohibition-era New York and are thrust into the middle of a political fight with dragons, mobsters, an...

The Invisible Library

By Genevieve Cogman

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The Invisible Library

By Genevieve Cogman

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Collecting books can be a dangerous prospect in this fun, time-traveling, fantasy adventure—the first in the Invisible Library series!   One thing any Librarian will tell you: the truth...

The Masked City

By Genevieve Cogman

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Librarian-spy Irene and her apprentice Kai are back in the second in this “dazzling”* book-filled fantasy series from the author of The Invisible Library.   The written word is mig...

The Burning Page

By Genevieve Cogman

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Librarian spy Irene and her apprentice Kai return for another “tremendously fun, rip-roaring adventure,” (A Fantastical Librarian)—the third in the bibliophilic fantasy series fro...

Invisible Library

By Genevieve Cogman

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Masked City

By Genevieve Cogman

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The Burning Page

By Genevieve Cogman

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The Secret Chapter

By Genevieve Cogman

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Burning Page The

By Susan Duerden, Genevieve Cogman

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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.