William Kotzwinkle Books

Rough Weather Ahead for Walter the Farting Dog

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Professor Kompressor visits Walter's family, offering a remedy for the dog's digestive disorder: special food that must be mixed in his Kompressatron. Unfortunately, the professor's cure doesn't wo...

The nap master

By William Kotzwinkle

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Herman refuses to take a nap until the Nap Master takes him to the Land of Dreams.

The nap master

By William Kotzwinkle

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Herman refuses to take a nap until the Nap Master takes him to the Land of Dreams.

E.T. The Extra Terrestrial

By William Kotzwinkle

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Christmas at Fontaine's

By William Kotzwinkle

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Queen of Swords

By William Kotzwinkle

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ET, the book of the Green Planet

By William Kotzwinkle

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The exile.

By William Kotzwinkle

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E. T. The Extra terrestrial Picture Knight

By William Kotzwinkle

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E. T.

By William Kotzwinkle

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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.