Daniel Klein Books

Plato and a Platypus Aristotle and an Aardvark

By Daniel Klein, Thomas Cathcart

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Heidegger and a Hippo Walk Through Those Pearly Gates

By Daniel Klein, Thomas Cathcart

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Q. Why are there almost as many jokes about death as there are about sex?  A. Because they both scare the pants off us. Thomas Cathcart and Daniel Klein first made a name for themselves with...

Plato and a Platypus Walk into a Bar ...

By Daniel Klein, Thomas Cathcart

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Plato and a Platypus Walk into a Bar . . .

By Daniel Klein, Thomas Cathcart

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This New York Times bestseller is the hilarious philosophy course everyone wishes they’d had in school.Outrageously funny, Plato and a Platypus Walk into a Bar... has been a breakout bestsell...

Plato and a Platypus Walk into a Bar...

By Daniel Klein, Thomas Cathcart

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Plato and a Platypus Walk into a Bar

By Daniel Klein, Thomas Cathcart

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Every Time I Find the Meaning of Life They Change It

By Daniel Klein

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I Think Therefore I Draw

By Daniel Klein, Thomas Cathcart

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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.