Robert Roper Books

In caverns of blue ice

By Robert Roper

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A young mountaineer in love with another climber faces the ultimate test of her life in the blue ice of the Himalayas.

Fatal Mountaineer: The High-Altitude Life and Death of Willi Unsoeld, American Himalayan Legend

By Robert Roper

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Fatal Mountaineer: The High-Altitude Life and Death of Willi Unsoeld, American Himalayan Legend

By Robert Roper

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Dora Goes to the Doctor Dora Goes to the Dentist (Dora the Explorer)

By Ellen Rosebrough

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Join Nickelodeon's Dora the Explorer as she visits the doctor for a checkup. Then flip the book over and follow her to the dentist. This 2-in-1 storybook is sure to entertain girls and boys ages 3-...

Alma Winklegrin s Lower Denture Is Missing

By R. R. Roper

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Death Comes to Dinner Scene of the Crime

By Marvin Miller, Robert Roper

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Tornadoes Can Make It Rain Crabs

By Melvin Berger, Gilda Berger

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On Spider Creek :a novel

By Robert Roper

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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.