Karen Gravelle Books

Five Ways to Know about You

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Shows readers how to learn about themselves and their futures by using the techniques of astrology, palm reading, numerology, Chinese horoscopes, and handwriting analysis.

The Driving Book

By Karen Gravelle

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Regl Kitabi

By Jennifer Gravelle Stratton Karen Gravelle

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EL LIBRO DE LA REGLA

By GRAVELLE K. Y GRAVELLE J.

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Que Esta Acontecendo Ai Embaixo O

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Haciendose Mujer Becoming a Woman

By Karen Gravelle, Gravelle Karen

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Este libro es acerca de la menstruación de la mujer -- qué es, porque sucede, cómo se siente cuando la tienes y que haces cuando la tienes.

Soaring Spirits

By Karen Gravelle

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El Libro de La Regla

By Karen Gravelle, Jennifer Gravelle

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Where Are My Birth Parents

By Susan Fischer, Karen Gravelle

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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.