Sandra Markle Books

Outside And Inside Spiders

By Sandra Markle

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Super Science Magic

By Sandra Markle

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Growing up wild

By Sandra Markle

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Describes different kinds of bear cubs and the changes they go through in their appearance and behavior as they grow up and become successful adult bears.

Really wild animals

By Sandra Markle

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Describes animals who are born and grow up in the ocean, including a baby octopus who hatches from an egg and a baby elephant seal who hides in kelp to escape sharks.

Can you believe?

By Sandra Markle

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Can you believe? :b volcanoes

By Sandra Markle

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Can You Believe

By Sandra Markle

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Amazing earth

By Sandra Markle

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Penguins

By Sandra Markle

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Depicts the hatching, care, growth, and education of baby Adelie penguins.

Make fake blood and 18 more spooky special effects

By Sandra Markle

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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.