Ruth Nulton Moore Books

Mystery of the missing stallions

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Teenage twins Sara and Sam investigate a young Vietnamese refugee hiding in an abandoned cabin and the mysterious disappearance of thoroughbred stallions from a neighbor's horse farm.

Mystery of the secret code

By Ruth Nulton Moore

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Teen-agers searching for a treasure hidden at an old farm find a secret message written in code.

Mystery of the lost heirloom

By Ruth Nulton Moore

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While accompanying their father to Wyalusing, Pennsylvania, to do research on a French refugee settlement of 200 years ago, twins Sam and Sara become involved in a search for the valuable stolen pe...

Ghost town mystery

By Ruth Nulton Moore

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Accompanying their father on a project that takes them to a ghost town in Nevada, teenage twins Sara and Sam discover peculiar nocturnal activities and clues to a hidden treasure of gold nuggets.

Distant thunder

By Ruth Nulton Moore

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Staying in the Moravian community of Bethlehem, Pennsylvania, when the American Revolution breaks out, fifteen-year-old Kate and her friends demonstrate how a peaceful people can help alleviate the...

Mystery at Captain's Cove

By Ruth Nulton Moore

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While visiting Aunt Kay in Hawaii, twins Sara and Sam uncover a mystery surrounding an ancient curse.

Where the eagles fly

By Ruth Nulton Moore

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When twelve-year-old Greg and his sister Jenny arrive at their newest foster home in Erie, Pennsylvania, Greg is wary until he befriends an elderly former ship captain.

Peace treaty

By Ruth Nulton Moore

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A young Moravian boy, captured by Indians near Fort Duquesne, realizes he can use his faith to promote peace.

Peace treaty

By Ruth Nulton Moore

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A young Moravian boy, captured by Indians near Fort Duquesne, realizes he can use his faith to promote peace.

Mystery of the lost treasure

By Ruth Nulton Moore

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Two youngsters follow clues from an old diary hoping to find a treasure buried years ago on their aunt's Pennsylvania farm.

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.