Jennifer Allison Books

The Ghost Sonata

By Jennifer Allison

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The Dead Drop

By Jennifer Allison

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Gilda Joyce And The Ladies Of The Lake Turtleback School Library Binding Edition

By Jennifer Allison

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Gilda Joyce, Psychic Investigator

By Jennifer Allison

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Ever since her father died, quirky Gilda Joyce has been working hard to sharpen her psychic skills. She's determined to communicate with spirits from the Other Side and become a crack investigator...

Gilda Joyce: The Ladies of the Lake

By Jennifer Allison

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Zany Gilda Joyce leaves her wacky disguises at home but brings all her psychic and investigative skills with her as she sets out to investigate a mysterious death at a Catholic girls? school. Is Ou...

Iggy Loomis, A Hagfish Called Shirley

By Jennifer Allison Illustrated By Michael Moran

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Iggy Loomis and his cool superpowers are back in this illustrated sci-fi chapter book for elementary school fans of The Adventures of Captain Underpants Daniel is trying really hard to be a good ol...

Gilda Joyce: The Bones of the Holy

By Jennifer Allison

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When Gilda Joyce's mother announces her engagement to a man from St. Augustine, Florida, Gilda is appalled. She hasn't even given him the "Joyce Family Application" yet! But as the wedding preparat...

Gilda Joyce: The Ghost Sonata

By Jennifer Allison

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Gilda Joyce?s best friend, Wendy Choy, is chosen to participate in a piano competition in Oxford, England, so of course super-sleuth Gilda finds a way to go too. Once there, the grueling practice s...

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.