Ramsay MacMullen Books

How did the early Christian church manage to win its dominant place in the Roman world? In his newest book, an eminent historian of ancient Rome examines this question from a secular rather than an...

Corruption and the decline of Rome

By Ramsay MacMullen

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Christianity and Paganism in the Fourth to Eighth Centuries

By Ramsay MacMullen

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Ramsay MacMullen investigates the transition from paganism to Christianity between the fourth and eighth centuries. He reassesses the triumph of Christianity, contending that it was neither tidy no...

Romanization in the Time of Augustus

By Ramsay MacMullen

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"During the lifetime of Augustus (from 63 B.C. to A.D. 14), Roman civilization spread at a remarkable rate throughout the ancient world, influencing such areas as art and architecture, religion, la...

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.