Lutz Kaelber Books

Schools of asceticism

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Max Weber argued that medieval religious movements were an important source for the distinctive rationality of Western civilization. He intended to study this theme but died before he could do so....

Schools of asceticism

By Lutz Kaelber

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Max Weber argued that medieval religious movements were an important source for the distinctive rationality of Western civilization. He intended to study this theme but died before he could do so....

The History of Commercial Partnerships in the Middle Ages

By Max Weber, Lutz Kaelber, Charles Lemert

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The Protestant Ethic Turns 100

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The Protestant Ethic Turns 100

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Protestant Ethic Turns 100

By William H. Swatos Jr, Lutz Kaelber

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Protestant Ethic Turns 100

By William H. Swatos Jr, Lutz Kaelber

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Protestant Ethic Turns 100

By William H. Swatos Jr, Lutz Kaelber

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Protestant Ethic Turns 100

By William H. Swatos Jr, Lutz Kaelber

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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.