Sandra Markle Books

Creepy spooky science

By Sandra Markle

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Presents an assortment of spooky experiments with information about the scientific principles involved.

Icky, squishy science

By Sandra Markle

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Details numerous science experiments which can be done at home, explains the various scientific phenomena involved, and suggests further experiments.

Creepy spooky science

By Sandra Markle

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Presents an assortment of awesome experiments with information about the scientific principles involved.

Weird, wacky, science

By Sandra Markle

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Presents facts revealing some of the strange and even weird aspects of humans, animals, and general science while also suggesting experiments related to this information.

How Many Baby Pandas Scholastic Book Fair Edition

By Sandra Markle

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Outside and Inside Bats Outside and Inside Walker Company

By Sandra Markle

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Outside and Inside Giant Squid Outside and Inside Walker Company

By Sandra Markle

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Slippery slimy baby frogs

By Sandra Markle

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Slippery, slimy baby frogs

By Sandra Markle

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Creepy, crawly baby bugs

By Sandra Markle

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Offers a close look at baby insects, those animals which are nicknamed "bugs."

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.