Chris Knopf Books

A sudden storm drives Sam, Amanda, and their sailboat into harbor at Fishers Island. The owner of the Black Swan, a small hotel, reluctantly gives them lodging. When a fellow lodger dies in circums...

A billion ways to die

By Chris Knopf

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Arthur Cathcart and Natsumi Fitzgerald wanted to believe they were free of the nearly invisible, malignant forces they had pursued, and been pursued by, across continents and oceans. The slightly b...

Cop Job

By Chris Knopf

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This sixth in the Sam Acquillo Hamptons Mystery series brings back Knopf's ensemble of famously eccentric and involving characters, not the least of which is Sam's mutt Eddie Van Halen. Combining...

The Last Refuge

By Chris Knopf

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You re Dead

By Chris Knopf

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The Last Refuge

By Chris Knopf

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Two Time

By Chris Knopf

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Trigger point therapy with the foam roller

By Karl G. Knopf

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"Deceptively simple and incredibly versatile, the trigger point foam roller is a highly effective self-therapy tool. By following the step-by-step movements in this book, you can maximize its heali...

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.