Charles Casillo Books

The Marilyn Diaries

By Charles Casillo

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The Marilyn Diaries

By Charles Casillo

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Marilyn Monroe

By Charles Casillo

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Marilyn Monroe

By Charles Casillo

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Elizabeth and Monty

By Charles Casillo

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Violet-eyed siren Elizabeth Taylor and classically handsome Montgomery Clift were the most gorgeous screen couple of their time. Over two decades of friendship they made, separately and together, s...

Outlaw

By Charles Casillo

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"When it first appeared in 1963, John Rechy's City of Night was greeted with equal parts fanfare and horror. The unapologetically sexual story of a young gay hustler was praised by critics but shoc...

The Fame Game

By Charles Casillo

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The Fame Game

By Charles Casillo

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Boys Lost Found

By Charles Casillo

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The Fame Game

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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.