Patrick G. O'Brien Books

Herbert Hoover: A Bibliography

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Considered an irredeemably flawed and catastrophic president during the Depression era, Herbert Hoover has been studied more objectively by postwar historians, with revisionist scholarship culminat...

Kansas Bootleggers

By Kenneth J. Peak, Patrick G. O'Brien

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A criminological view of Kansas during prohibition.

Herbert Hoover And The Historians

By Tom Walsh, Alexander DeConde, Ellis W. Hawley, Patrick G. O'Brien, Philip T. Rosen, Mark M. Dodge

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Herbert Hoover And Modern American History : Sixty Years After / Ellis W. Hawley -- Hoover And The Historians : The Reconstruction Of A President / Patrick G. O'brien, Philip T. Rosen -- Herbert Ho...

Herbert Hoover And The Historians

By Tom Walsh, Alexander DeConde, Ellis W. Hawley, Patrick G. O'Brien, Philip T. Rosen, Mark M. Dodge, Ellis W. Hawley... [Et Al.]; Introduction By Tom Walsh; Edited By Mark M. Dodge

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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.