Jonnie Jacobs Books

Murder Among Friends Kate Austen Mystery

By Jonnie Jacobs

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The Only Suspect

By Jonnie Jacobs

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The Next Victim Kali O Brien Mysteries

By Jonnie Jacobs

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Former District Attorney Kali O'Brien is horrified when she is informed that her brother, John, committed suicide after killing his ex-girlfriend Sloane Winslow and her housekeeper Olivia Perez.

Motion to Dismiss

By Jonnie Jacobs

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Cold justice

By Jonnie Jacobs

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Intent To Harm Kali O Brien Mysteries

By Jonnie Jacobs

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The next victim

By Jonnie Jacobs

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Former District Attorney Kali O'Brien is horrified when she is informed that her brother, John, committed suicide after killing his ex-girlfriend Sloane Winslow and her housekeeper Olivia Perez.

The Only Suspect

By Jonnie Jacobs

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Intent to Harm 18 Cpy Solid

By Jonnie Jacobs

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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.