Patrick O'Keefe Books

Alfred Hitchcock'S A Choice Of Evils

By Charles Boeckman, William Link, Lawrence Block, Jack Ritchie, Talmage Powell, Edward D. Hoch, Frank Sisk, Clark Howard, John Lutz, Donald Olson, Harold Q. Masur, Edward Wellen, Charles Mergendahl, Dan J. Marlowe, Stanley Cohen, Elana Lore, Richard Levinson, Joe L. Hensley, Richard Deming, Thomasina Weber, Borden Deal, Patrick O'Keefe, James Michael Ullman, Donald E. Westlake, Lawrence Treat, Robert L. Fish, Robert Bloch, John F. Suter, Evan Hunter, William Brittain, Arthur Porges, Virginia Long, Stephen Wasylyk, Sonora Morrow, W. Sherwood Hartman, Gloria Amoury

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348 pages ; 21 cm A host of lethal possibilities, resourceful criminals, ingenious schemes, and illegal activities is featured in a selection of mystery tales, written by masters of the genre "Most...

Alfred Hitchcock s Fatal Attractions

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Alfred Hitchcock s Fatal Attractions II

By Alfred Hitchcock

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Hill Road

By Patrick O Keeffe

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Hill Road

By Patrick O Keeffe

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Managing Online Forums

By Patrick O Keefe

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I Didn t Know That

By O Keefe Patrick Home Improvement

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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.