Hillary Monahan Books

Wicked Women

By Lynne Hansen, Scott T. Goudsward, Trisha J. Wooldridge, Hillary Monahan, Jane Yolen

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His Hideous Heart

By Emily Lloyd Jones, Dahlia Adler, Caitlin Davies, Natalie Naudus, JorJa Brown, Robin Miles, Amanda Lovelace, James Fouhey, Kendare Blake, Fran Wilde, Tessa Gratton, Caleb Roehrig, Hillary Monahan, Jeanette Illidge

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The Bloody Mary Saga

By Hillary Monahan

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Mary

By Hillary Monahan

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The hollow girl

By Hillary Monahan

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Bethan is the apprentice to a green healer named Drina in a clan of Welsh Romanies. Her life is happy and ordered - and modest, as required by Roma custom - except for one thing: the son of the chi...

The Hollow Girl

By Hillary Monahan

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For fans of Asylum, Anna Dressed in Blood, and The Haunting of Sunshine Girl comes a new feminist horror novel from the New York Times bestselling author of Mary: The Summoning.   Five boys at...

Gods and Monsters Snake Eyes

By Hillary Monahan

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Mary

By Hillary Monahan

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Teens Jess, Shauna, Kitty, and Anna follow all the rules, but when their summoning circle is broken the vengeful spirit of Bloody Mary slips through, and as the girls struggle to escape Mary's wrat...

Mary

By Hillary Monahan

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Jess McAllister's summoning obsession has turned into a deadly haunting since the ghost of Mary Worth will not rest until Jess has come undone, so now it is up to Jess and her reluctant friends, Sh...

Mary

By Hillary Monahan

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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.