Roger S. Baum Books

The rewolf of Oz

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The great-grandson of L. Frank Baum introduces a new character to the Oz family, Rewolf, who is helped by Dorothy and her companions to appreciate himself.

Dorothy of Oz

By Roger S Baum

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With the aid of Lion, Scarecrow, the Tin Man, and Tugg the talking boat, Dorothy battles Jester, who is using the dead Wicked Witch's magic wand to turn the citizens of Oz into porcelain dolls.

The rewolf of Oz

By Roger S. Baum

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The great-grandson of L. Frank Baum introduces a new character to the Oz family, Rewolf, who is helped by Dorothy and her companions to appreciate himself.

The SillyOZbuls of Oz

By Roger S. Baum

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The SillyOZbul of Oz and Toto

By Roger S. Baum

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The SillyOZbul of Oz and the magic merry-go-round

By Roger S. Baum

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The Lion of Oz and the badge of courage

By Roger S. Baum

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This adventure by the great-grandson of L. Frank Baum introduces the Cowardly Lion as a cub up until he meets Dorothy and the others on the Yellow Brick Road.

Toto in Candy Land of Oz

By Roger S. Baum

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The Wizard of Oz and the Magic Merry Go Round

By Roger S. Baum

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Lion of Oz and the Badge of Courage

By Roger S. Baum

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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.