Mary Downing Hahn Books

Forthright, domineering Sara shows Emily how to speak up for herself and what she likes, but as a result Emily finds herself having to take a stand against Sara.

The Wind Blows Backward

By Mary Downing Hahn

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Although they share a love of poetry and problems with their parents, a shy high school senior's attraction to a popular classmate is tempered by her fear of his moody, self-destructive side.

The doll in the garden.

By Mary Downing Hahn

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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.