Paul Madonna Books

"Paul Madonna's popular comic, All Over Coffee had been running for twelve years in the San Francisco Chronicle when Madonna was evicted from his home in the city's Mission District. Another victim...

Close enough for the angels

By Paul Madonna

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"Emit Hopper was a one-hit wonder--twice. First as a rock and roller in the 80s, then as a literary darling in the 90s. Now it's twenty years later, and despite his desire to remain a simple laundr...

Spirits of San Francisco

By Paul Madonna, Gary Kamiya

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On to the Next Dream

By Paul Madonna

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Follow Yourself

By Paul Madonna

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Everything Is Its Own Reward

By Paul Madonna

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San Francisco Literary Map

By Paul Madonna, Alvaro Villanueva, Jenny Traig

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Come to Light

By Paul Madonna

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You Know Exactly

By Paul Madonna

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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.