Gloria Skurzynski Books

Mysteries in Our National Parks: Buried Alive

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Who was that man in the Park Service uniform who brought Jack and Ashley Landon into the wilds of Alaska’s Denali National Park along with their friend Nicky Milano? Whoever he was, he has gi...

Mysteries in Our National Parks: Night of the Black Bear

By Gloria Skurzynski, Alane Ferguson

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This thrilling series roars back to life with the release of Mystery #13, Night of the Black Bear. Something very strange is going on in Great Smoky Mountains National Park. A teenage girl is the...

Wolf Stalker

By Gloria Skurzynski

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Virtual War

By Gloria Skurzynski

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Afterwar

By Gloria Skurzynski

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There's only one thing more deadly than disease, more destructive than the forces of nature: jealousy. It's been years since the world was nearly destroyed by natural disasters, but even the bigges...

Good Bye Billy Radish

By Gloria Skurzynski

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Minstrel in the Tower

By Gloria Skurzynski

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What happened in Hamelin

By Gloria Skurzynski

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A novel of the Pied Piper legend told from the standpoint of a 14-year-old baker's assistant who dreams of freedom from his harsh medieval life and of a new life with the piper.

Lost in the moving mountains

By Gloria Skurzynski

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While on a three day hike in the mountain wilderness, two thirteen-year-old brothers must use all their skill to survive when they are confronted by an injured drug dealer and are caught in an eart...

Valley of death

By Gloria Skurzynski

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The Landon family makes a trip to Death Valley National Park accompanied by a mysterious new foster child, fourteen-year-old Leesa Sherman.

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.