Walter Krudop Books

The man who caught fish

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A stranger with a bamboo pole magically catches fish and hands them out to villagers, saying "One person, one fish," but the king will not be content until he receives a whole basket of fish.

Blue claws

By Walter Krudop

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A young boy gets to know his grandfather better when the two of them spend the day together crabbing.

Something is growing

By Walter Krudop

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When Peter plants a seed near a city street, things very quickly get out of control.

Algo esta creciendo

By Walter Krudop

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When Peter plants a seed near a city street, things very quickly get out of control.

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.