David Wylie Books

New Refrigerants for Air Conditioning and Refrigeration Systems

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The gumdrop monster

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Introduces the various colors as a boy and his dog follow a trail of gumdrops and encounter different monsters before they find the Gumdrop Monster.

Have You Hugged Your Monster Today?

By Joanne Wylie, David Wylie, David

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Rhyme text describes some of the exemplary behavior for which the good monster deserves a hug.

How many monsters?

By Joanne Wylie

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Introduces the numbers one through ten as the reader is asked to count the similar monsters and other objects on each page.

Un cuento de un pez grande

By Joanne Wylie

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The narrator describes the fish he caught in words that keep increasing its size.

UN Cuento Gracioso De Peces a Funny Fish Story Fishy Fish Stories Concept Books

By Joanne Wylie, David Wylie

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Sabes donde esta tu monstruo esta noche?

By Joanne Wylie

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Monsters know good places to hide and the reader must find the monster in each picture as the various clocks show the hours from one to twelve.

Has Abrazado Hoy a Tu Monstruo?

By Joanne Wylie, David Wylie

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Rhymed text describes some of the exemplary behavior for which the good monster deserves a hug.

Cuantos Monstruos

By Joanne Wylie, David Wylie

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El Pequeno Monstruo

By Joanne Wylie, David Wylie

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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.