Nishio Tetsuya Books

Original O'Ekaki

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Like sudoku, O'Ekaki (Paint by Numbers) provides an entertaining test of one's logic, using a grid as its playing field. But rather than leaving the player with boxes of numbers, O'Ekaki ends with...

Sudoku Plus, Volume One

By Nishio Tetsuya

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The puzzles in Sudoku Plus are conceived by Japan's greatest puzzle mind, Tetsuya Nishio, who takes extreme pleasure in handcreating his puzzles. His latest series, Sudoku Plus provides 101 Sudoku...

Sudoku Plus, Volume Two

By Nishio Tetsuya

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The puzzles in Sudoku Plus are conceived by Japan's greatest puzzle mind, Tetsuya Nishio, who takes extreme pleasure in handcreating his puzzles. His latest series, Sudoku Plus provides 101 Sudoku...

Sudoku Plus, Volume Three

By Nishio Tetsuya

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The puzzles in Sudoku Plus are conceived by Japan's greatest puzzle mind, Tetsuya Nishio, who takes extreme pleasure in handcreating his puzzles. His latest series, Sudoku Plus provides 101 Sudoku...

Nishio s Big Book of Puzzles

By Nishio Tetsuya, Tetsuya Masuda

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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.