Frank Portman Books

King Dork

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From Frank Portman comes the long-awaited sequel to the beloved cult classic King Dork, of which John Green, author of The Fault in Our Stars, said, “Basically, if you are a human being with even a...

King Dork

By Frank Portman

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High school loser Tom Henderson discovers that "The Catcher in the Rye" may hold the clues to the many mysteries in his life.

King Dork

By Frank Portman

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Andromeda Klein

By Frank Portman

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High school sophomore Andromeda, an outcast because she studies the occult and has a hearing impairment and other disabilities, overcomes grief over terrible losses by enlisting others' help in her...

King Dork

By Frank Portman

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King Dork Approximately

By Frank Portman

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Andromeda Klein

By Frank Portman

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King Dork Approximately

By Frank Portman

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King Dork

By Frank Portman

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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.