Eric Berlin Books

Puzzling World of Winston Breen

By Eric Berlin

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The Potato Chip Puzzles

By Eric Berlin

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Read Eric Berlin's posts on the Penguin Blog.When puzzle addict Winston Breen and his best friends head to an all-day puzzle hunt with a $50,000 grand prize, they’re pumped. But the day is no...

For fans of The Westing Game and The 39 Clues, a third exciting Winston Breen adventure!Winston Breen and his friends Mal and Jake accompany Mr. Penrose for a weekend of puzzles and games at the ma...

The Puzzling World of Winston Breen

By Eric Berlin

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Winston Breen says the only thing better than discovering a puzzle is stumping someone else with it. But when his sister uncovers mysterious strips of wood with words and letters on them, even Wins...

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.