Isabel R. Marvin Books

A Bride for Anna s Papa

By Isabel R. Marvin

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Bridge to Freedom

By Isabel Marvin

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Bridge to freedom

By Isabel R. Marvin

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As World War II winds down, a fifteen-year-old deserter from the German army reluctantly joins forces with a Jewish girl and tries to cross the border to safety in Belgium.

Josefina and the hanging tree

By Isabel R. Marvin

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Near Goliad, Texas, in 1857, twelve-year-old Josefina Gonzalez fears for her father's safety when a number of other Mexican cart drivers are killed.

Josefina and the hanging tree

By Isabel R. Marvin

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Near Goliad, Texas, in 1857, twelve-year-old Josefina Gonzalez fears for her father's safety when a number of other Mexican cart drivers are killed.

A bride for Anna's Papa

By Isabel R. Marvin

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In 1907, thirteen-year-old Anna tries to find a bride for her father who works in the iron mines of northern Minnesota.

A bride for Anna's Papa

By Isabel R. Marvin

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In 1907, thirteen-year-old Anna tries to find a bride for her father who works in the iron mines of northern Minnesota.

Shipwrecked on Padre Island

By Isabel R. Marvin

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In this fictionalized account of a 1554 shipwreck off Padre Island, Texas, a thirteen-year-old survivor loses a treasured gold bracelet which links her to present-day visitors to the island.

The tenth rifle and the Jesse James gang

By Isabel R. Marvin

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The mystery of the Ice Cream House

By Isabel R. Marvin

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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.