Glenn A. Knoblock Books

Historic Iron and Steel Bridges in Maine New Hampshire and Vermont

By Glenn A. Knoblock

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Historic iron and steel bridges in Maine New Hampshire and Vermont

By Glenn A. Knoblock

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"This book chronicles the development of metal truss and related bridges in Maine, New Hampshire and Vermont from the 1860s to 1940. While many notable metal bridges of the past are discussed, the...

African American Historic Burial Grounds and Gravesites of New England

By Glenn A. Knoblock

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African American World War II casualties and decorations in the Navy Coast Guard and Merchant Marine

By Glenn A. Knoblock

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"This book is an account of the 2,445 African American men who were killed, wounded or decorated during World War II in the Navy, Coast Guard, and Merchant Marine. In addition to detailing the circ...

Fighting for Freedom

By Teresa M. Knoblock, Glenn A. Knoblock, Jeffrey Morgan

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First Man Back

By Glenn A. Knoblock

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First Man Back

By Glenn A. Knoblock

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New Hampshire Covered Bridges

By Glenn A. Knoblock

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Historic Burial Grounds of the New Hampshire Seacoast

By Glenn A. Knoblock

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Portsmouth Cemeteries

By Glenn A. Knoblock

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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.