David Wojtowycz Books

The Snake Hotel

By David Wojtowycz, Brian Moses

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Jigsaw Nursery Busy Bunnies

By David Wojtowycz

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Jigsaw Seaside Busy Bunnies

By David Wojtowycz

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Elephant Joe, brave firefighter!

By David Wojtowycz

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At summer camp, Elephant Joe and Zebra Pete become firefighters to rescue Dragon from a tree and put out a birthday cake fire.

Elephant Joe, Brave Firefighter! (Step into Reading Comic Reader)

By David Wojtowycz

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This Step 2 Step into Reading Comic Reader is full of dragons, firefighting, and birthday cake! In this action-packed early reader, Elephant Joe stars as a brave firefighter with his trusty sidekic...

Animal ABC

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Animal Antics from 1 to 10

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Can you moo?

By David Wojtowycz

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Presents a variety of animals and the sounds they make.

Can you choo choo?

By David Wojtowycz

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Simple text and illustrations describe the sounds made by fire engines, buses, helicopters, race cars and other vehicles as they go about their work.

A cuddle for Claude

By David Wojtowycz

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Claude really wants a hug from his mom, but she is too busy.

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.