Stephen Roos Books

The gypsies never came

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Sixth-grader Augie Knapp, who has a deformed hand, is convinced by Lydie Rose, the strange new girl in town, that the gypsies are coming for him.

Fear Street Geisterstunde. Mitternacht am Friedhofstor.

By Robert Lawrence Stine

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Fear Street Geisterstunde. In den Fangen der Zauberin.

By Robert Lawrence Stine

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Quien Ha Dormido En Mi Tumba Who's Been Sleeping in My Grave (Coleccion Fantasmas De Fear Street Ghosts of Fear Street Series)

By Robert Lawrence Stine, Maria Luz Garcia De LA Hoz, Stephen Roos

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Zack Pepper thinks there is something very wrong with his substitute teacher, but no one will believe him, so he has to get rid of her all by himself. But how can he destroy someone who is already...

Never Trust a Sister over Twelve

By Diane DeGroat, Stephen Roos

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Never Trust a Sister over Twelve

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Never Trust a Sister over Twelve

By Stephen Roos

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Never Trust a Sister over Twelve

By Stephen Roos

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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.