Christopher Farnsworth Books

Flashmob: A Novel

By Christopher Farnsworth

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Blood Oath

By Christopher Farnsworth

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The President's Vampire

By Christopher Farnsworth

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The ultimate secret. The ultimate agent. Nathaniel Cade returns.For 140 years, Nathaniel Cade has been the President's Vampire, sworn to protect and serve his country. Cade's existence is the most...

Red, White, and Blood

By Christopher Farnsworth

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 The Presidential Campaign Trail, 2012: A political operative and a volunteer are brutally murdered while caught in a compromising position. Written in their blood on the wall of the crim...

Robert B. Parker's Buried Secrets

By Christopher Farnsworth

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Police Chief Jesse Stone investigates the mystery behind a dead body found strewn with photos of murder victims and placed on top of $2 million in cash, before a mob of hit men converge on Paradise...

Robert B. Parker's Buried Secrets

By Christopher Farnsworth

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Robert B. Parker's Buried Secrets

By Christopher Farnsworth

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Blood Oath

By Christopher Farnsworth

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Zach Barrows is an ambitious young White House staffer whose career takes an unexpected turn when he's partnered with Nathaniel Cade, a secret agent sworn to protect the President. But Cade is no o...

The President's Vampire

By Christopher Farnsworth

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For 140 years, vampire Nathaniel Cade has been bound to protect and serve the United States of America. When an ancient evil is resurrected, the President's Vampire and his human handler, Zach B...

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.