Cat Hellisen Books

"Deep in the forest, in a crumbling ruin of a castle, Sarah begins to untangle the layers of curses affecting her family, until she discovers that the curse has carried over to her, too. The day sh...

When the Sea Is Rising Red

By Cat Hellisen

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Mother Crone Maiden

By Cat Hellisen

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Beastkeeper

By Cat Hellisen

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Dreams from the Witch House 2018 Trade Paperback Edition

By Cat Hellisen, Tamsyn Muir, Marly Youmans, Caitlin R. Kiernan, Lucy Brady, Joyce Carol Oates

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Cast Long Shadows

By Cat Hellisen

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Cast Long Shadows

By Cat Hellisen

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Learning How to Drown

By Cat Hellisen

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Charm

By Cat Hellisen

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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.