Mary Downing Hahn Books

The time of the witch

By Mary Downing Hahn

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Promises to the Dead

By Mary Downing Hahn

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Twelve-year-old Jesse leaves his home on Maryland's Eastern Shore to help a young runaway slave find a safe haven in the early days of the Civil War.

Anna on the Farm

By Mary Downing Hahn

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In the summer before World War I, nine-year-old Anna is happy to spend a week at her aunt and uncle's Beltsville, Maryland, farm until she meets Theodore, who calls her a "city slicker" and spurs h...

Look for Me by Moonlight

By Mary Downing Hahn

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Guest A Changeling Tale

By Mary Downing Hahn

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The Thirteenth Cat

By Mary Downing Hahn

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A Ghostly Collection

By Mary Downing Hahn

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Wait Till Helen Comes

By Mary Downing Hahn

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December stillness

By Mary Downing Hahn

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Fourteen-year-old Kelly tries to befriend Mr. Weems, a disturbed, homeless Vietnam War veteran who spends his days in her suburban library, though the man makes it clear he wants to be left alone.

The Doll in the Garden

By Mary Downing Hahn

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After Ashley and Kristi find an antique doll buried in old Miss Cooper's garden, they discover that they can enter a ghostly turn-of-the-century world by going through a hole in the hedge

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.