Donna Kauffman Books

"For every soul there is one true mate." So says Sebastien Valentin, a former privateer destined to spend eternity bringing soul mates together. Hexed by a voodoo priestess nearly two centuries ago...

The Royal Hunter: A Novel

By Donna Kauffman

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She escaped every trap he set — only to fall prey to his timeless seduction....As a child, animal rescue worker Talia Trahaern was enchanted by the bedtime stories her mother spun of castles and ki...

The Big Bad Wolf Tells All

By Donna Kauffman

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Tanzy Harrington is the ultimate Alpha Female. As the Bay Area's most-read single-scene columnist and self-proclaimed love-'em-and-leave-'em artist, she's not about to tie herself down to one man—e...

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.