Harry Fisch Books

The Male Biological Clock

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A sex education guide for grown-ups offers easy-to-follow advice and stories from real couples on topics ranging from sexual frequency, desire, and addiction to communication between partners and t...

Le Sexe des Hommes enfin expliquA C aux Femmes French Edition

By Fisch Harry Baskin Kara

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Size Matters

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A man’s anatomy is a lot easier to understand than his mind, and knowing what’s going on down there is just as important to a happy relationship as figuring out the deeper meaning of his every word...

Size Matters

By Harry Fisch

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New Naked

By Harry Fisch, Karen Moline

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New Naked

By Harry Fisch, Karen Moline

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New Naked

By Harry Fisch, Karen Moline

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Male Biological Clock

By Harry Fisch, Stephen Braun

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Male Biological Clock

By Harry Fisch, Stephen Braun

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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.