Susan Sizemore Books

In a community kept hidden, the Enforcers are an elite group of vampires sworn to serve and protect their kind—and follow the Laws of the Blood… As one of Chicago’s vampire hunte...

Laws of the Blood 4: Deceptions

By Susan Sizemore

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Olympias has long reigned as the Enforcer of Washington, DC, but now her devoted human servant is questioning her command. With no allies, Olympias must stand-alone against those bent on her destru...

Laws of the Blood 2: Partners

By Susan Sizemore

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Vampire Enforcer Char forms an unlikely partnership with vampire hunter Jubal Haven to find a missing teenager-who's in the hands of a dark cult which may prove deadly to vampire and human alike.

Laws of the Blood 1: The Hunt

By Susan Sizemore

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From the New York Times bestselling author of Primal Heat. In the first book of the series, readers are introduced to the Enforcers, an elite group of vampires who must serve and protect their sec...

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.