Wayne Gould Books

The Times Su Doku

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Su Doku, the wordless crossword in 'The Times', has taken the puzzle world by storm. This official book of the puzzle aims to satisfy the many fans of this exciting new brainteaser.

The Times Su Doku Book 2: 100 original puzzles: Bk. 2

By Wayne Gould

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The Times Su Doku Book 1: The Utterly Addictive Number-placing Puzzle

By Wayne Gould

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Su Doku Book 1: The utterly addictive number-placing puzzle: The Utterly Addictive Number Placing Game

By Wayne Gould

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The Times Su Doku Book 4: 100 original puzzles: Bk. 4

By Wayne Gould

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The Times Su Doku Book 5: 100 original puzzles: Bk. 5

By Wayne Gould

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The Times Su Doku for Beginners

By Wayne Gould

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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.