Donald Lemke Books

The Penguin's arctic adventure

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When Oswald Chesterfield Cobblepot, also known as the Penguin, opens an exotic animals garden in Gotham City, Batman investigates to discover if the garden has a connection to the businessmen in to...

Winter wasteland

By Donald B. Lemke

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"When Mr. Freeze and the Ice Pack bring a blast of villainous cold to Gotham City, it's up to Batman to break the ice. With a little help from Wonder Woman and the Flash, the World's Greatest Detec...

Bian fu xiaAn I can read book Adventures of Batman 5he1jing zhuangDawn of the Dynamic Duo

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Guinness world records

By Donald Lemke

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This book is all about the incredible people who push themselves to their physical limits. Whether it's swallowing the most swords, pulling a 200-ton plane, or balancing on four fingers for the lon...

A giant attack

By Donald B. Lemke

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Superman meets Lex Luthor in a "big" fight.

The Joker's ice scream

By Donald B. Lemke

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When Joker and Harley Quinn get the Gotham City Police eating out of the palms of their hands, only Batman and Batgirl can serve up sweet justice!

Superman

By Donald B. Lemke

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"When Mister Mxyzptlk starts pulling dangerous pranks all over Metropolis to get into the headlines, Superman uses his ties at the Daily Planet to trick the trickster into taking a serious time-out...

Superman

By Donald Lemke

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When Bizarro starts terrorizing Metropolis, it s up to Superman to set the backwards villain straight. With a little help from Supergirl, this super team will keep Bizarro from having the last laugh.

Batman Classic

By Andie Tong, Donald Lemke

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Superman Versus The Silver Banshee Turtleback School Library Binding Edition I Can Read Level 2

By Donald Lemke

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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.