Mullen, James Books

Boston Harbors Murder

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Drug smuggler murders on a choppy summer sea, a withered hand found in a harbor island landfill, a large pool of blood splayed over the cold concrete of a downtown Boston subway platform are all in...

Ketchum And Cobb: A Boston Crime Novel

By Jim Mullen, James Mullen, Mullen, James

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For nine days in October of 1990, two Boston homicide detectives, Ketchum and Cobb, investigate the brutal murder of a South Boston man in his living room. For each, the case knifes through the mid...

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.