Carlyle Jansen 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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Anal sex basics

By Carlyle Jansen

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"No butts about it ... this is only book you need for your journey to anal pleasure. The days of boring sex routines are over. It's time to get a little taboo, starting with the absolute basics of...

Sex yourself

By Carlyle Jansen

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"Practice makes perfect!Everyone knows sex in a long-term relationship can get stale sometimes. But isn't the same true for masturbation? Just like a familiar sexual relationship, where you fall in...

Sex yourself

By Carlyle Jansen

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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.