Roland H. Worth Books

No choice but war

By Roland H. Worth

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Church Monarch and Bible in Sixteenth Century England

By Roland H. Jr. Worth

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"Previous works on English Bible translations from Tyndale to King James have concentrated on either the scholarship or the religious passions of the time. Church, Monarch and Bible examines each t...

Biblical studies on the internet

By Roland H. Worth

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Alternative Lives of Jesus

By Roland H. Jr. Worth

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Congress declares war

By Roland H. Worth

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"The dramatic events of the Pearl Harbor attack have been covered in great detail and variety. What came next - the American declaration of war, the intervention of Germany and Italy, and the U.S....

Messiahs and Messianic Movements Through 1899

By Roland H. Jr. Worth

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Shapers of Early Christianity

By Roland H. Jr. Worth, Roland H. Worth

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"Discusses the beliefs and behaviors of 50+ figures (100-400 A.D.) who played a role in the transformation from primitive Christianity to early Medieval Catholicism. Provides an overview of each pe...

This Day in American History

By Roland H. Jr. Worth, Ernie Gross

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The Sermon on the Mount

By Roland H. Worth, Roland H. Worth Jr.

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Pearl Harbor

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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.