Katherine Howe Books

Astor

By Anderson Cooper, Katherine Howe

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Astor

By Anderson Cooper, Katherine Howe

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The Physick Book of Deliverance Dane

By Katherine Howe

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While clearing out her grandmother's cottage for sale, Connie Goodwin finds a hidden parchment inscribed with the name Deliverance Dane. And so begins the hunt to uncover the woman behind the name,...

The Physick Book of Deliverance Dane

By Katherine Howe

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The House of Velvet and Glass

By Katherine Howe

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Conversion

By Katherine Howe

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A chilling mystery based on true events, from New York Times bestselling author Katherine Howe. It’s senior year, and St. Joan’s Academy is a pressure cooker. Grades, college applications, boys’ te...

House of Velvet and Glass

By Katherine Howe

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The Penguin Book of Witches

By Edited By Katherine Howe

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Chilling real-life accounts of witches, from medieval Europe through colonial America, compiled by the New York Times bestselling author of The Physick Book of Deliverance Dane and The Daughters of...

True Account of Hannah Masury s Sojourn Amongst the Pyrates Written by Herself

By Katherine Howe

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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.