Dennis Marks Books

Tom and Jerry

By Jordan Horowitz

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Daniel and the lion's den

By Christine L. Benagh

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Three friends on the site of an archeological dig travel back in time and meet Daniel, whose faith in God is tested when he is thrown into a lion's den.

Wandering Jew

By Dennis Marks

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Joseph Roth, best known as the author of the novel The Radetzky March and the nonfiction work The Wandering Jews, was one of the most seductive, disturbing, and enigmatic writers of...

Repercussions: Celebration of African-American Music

By Geoffrey Haydon, Dennis Marks

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Wandering Jew

By Dennis Marks

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Joseph Roth, best known as the author of the novel The Radetzky March and the nonfiction work The Wandering Jews, was one of the most seductive, disturbing, and enigmatic writers of...

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.