Dewey Blocksma Books

Action Contraptions: Easy-To-Make Toys That Really Move

By Mary Blocksma, Dewey Blocksma, Sandra Hulst

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Presents instructions for making cars, trucks, and other toys out of materials found around the house.

Easy-To-Make Spaceships That Really Fly

By Mary Blocksma, Dewey Blocksma

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Provides directions for spaceships that can be made without adult supervision from paper plates, straws, styrofoam cups, and other materials available in supermarkets. Includes suggestions for desi...

Easy-To-Make Spaceships That Really Fly

By Dewey Blocksma Mary Blocksma

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Easy-to-make water toys that really work

By Mary Blocksma

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Instructions for making toys that move in water using styrofoam, plastic straws, balloons, and other simple materials.

Space Crafting

By Mary Blocksma, Dewey Blocksma

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Action Contraptions

By Mary Blocksma, Dewey Blocksma, Sandra Hulst

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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.