Erwin Brecher Books

Hocus Pocus

By Erwin Brecher

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More Hocus Pocus

By Erwin Brecher, Julian Pottage

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Focus On Hocus Pocus

By Erwin Brecher, Danny Roth

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Are there rainbows on the moon

By Erwin Brecher

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"A book for the curious, this engaging read takes a slightly different look at puzzle questions--every one is based exclusively on real world science. Using scientific principles, it teaches how th...

Bridge 80 Classic Problems

By Erwin Brecher, Danny Roth

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How do you walk on fire and other puzzles

By Erwin Brecher

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Comment mettre un oeuf dans une bouteille Jeux

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Logique vous avez dit logique

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Surprising science puzzles

By Erwin Brecher

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De IQ trainer

By Erwin Brecher

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Handleiding voor het trainen van het eigen IQ. Het doorwerken van dit boek kan de score op IQ-tests aanmerkelijk verbeteren.

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.