Jeri Westerson Books

Serpent in the Thorns: A Medieval Noir

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After the French king's courier is killed by a crossbow in a tavern, a barmaid seeks the assistance of fourteenth-century detective Crispin Guest, who soon finds himself the prime suspect in the mu...

Veil of Lies: A Medieval Noir

By Jeri Westerson

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The Demon's Parchment: A Medieval Noir

By Jeri Westerson

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The Demon's Parchment: A Medieval Noir

By Jeri Westerson

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Former knight and nobleman Crispin Guest, now surviving as a detective in 14th century London, agrees to track down stolen parchments possibly connected with a series of brutal murders for a Jewish...

Season of Blood

By Jeri Westerson

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The deepest grave

By Jeri Westerson

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"Father Bulthius Braydon begs Crispin Guest for help when corpses are seen stalking St Modwen Church's graveyard, while Crispin's seven-year-old son is accused of murder. As Crispin investigates, i...

Traitor s Codex

By Jeri Westerson

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Sword of Shadows

By Jeri Westerson

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Spiteful Bones

By Jeri Westerson

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The Daemon Device

By Jeri Westerson, Robert Carrasco

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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.