Gregg Olsen Books

After a Pacific Northwest family is slaughtered and their teenage son disappears, Emily Kenyon spearheads the hunt for the murderer of a series of families. But Emily's teenage daughter Jenna knows...

A Wicked Snow

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A Wicked Snow

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Victim six

By Gregg Olsen

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The bodies are found in towns and cities around Puget Sound. The young women who are the victims had nothing in common. But a depraved killer has carefully chose them to stalk, capture, and torture...

Closer than blood

By Gregg Olsen

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"The first time was easy. No one ever suspected the victim had been murdered. The crime long buried, the dark passions guiding the killer's hand are still alive. But the need for revenge cannot be...

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.