Roy Hoopes Books

Ralph Ingersoll
Ralph Ingersoll

By Roy Hoopes

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The Changing Vice Presidency
The Changing Vice Presidency

By Roy Hoopes

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Through biographical sketches of each vice-president, traces the evolution of what is now one of the most important jobs in the United States, with special focus on Walter Mondale.

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The Changing Vice-Presidency
The Changing Vice-Presidency

By Roy Hoopes

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Through biographical sketches of each vice-president, traces the evolution of what is now one of the most important jobs in the United States, with special focus on Walter Mondale.

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Americans remember the home front
Cain
Cain

By Roy Hoopes

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James m Cain Cookbook
The James M. Cain Cookbook
Political campaigning
Political campaigning

By Roy Hoopes

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Describes a presidential campaign discussing such aspects as why a person decides to run, the responsibilities of staff members, and the planning of a campaign from the primaries to the national co...

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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.

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