Nina Hartley Books

Secrets of the Sex Masters

By Jaeleen Bennis, Charlie Glickman, Megan Andelloux, Nina Hartley, Eve Minax, Ernest Greene, Carl Frankel, Carlyle Jansen, Joseph Kramer, Reid Mihalko

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Nina Hartley s Guide to Total Sex

By Nina Hartley

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Nina Hartley's Guide to Total Sex

By Nina Hartley

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Nina Hartley's Guide to Total Sex

By Nina Hartley

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Legendary porn star Nina Hartley's guide to thrilling, liberating, mind-blowing, soul-fulfilling, and intimacy-building sex! Witty, smart, and frankly provocative, Nina Hartley knows sex. As a sex...

Lesbian Sex Tips for Men

By Tristan Taormino

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Nina Hartley s Sex Tips for Straight Men

By Nina Hartley

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Nina Hartley's Guide to Total Sex

By Nina Hartley

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Legendary porn star Nina Hartley's guide to thrilling, liberating, mind-blowing, soul-fulfilling, and intimacy-building sex! Witty, smart, and frankly provocative, Nina Hartley knows sex. As a sex...

How to Be Kinkier

By Nina Hartley, Morpheous

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How to Be Kinkier

By Nina Hartley, Morpheous

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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.