Rick Riordan Books

The Trials of Apollo, Book Four: The Tyrant's Tomb

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It's not easy being Apollo, especially when you've been turned into a human and banished from Olympus. On his path to restoring five ancient oracles and reclaiming his godly powers, Apollo (aka Les...

The Tower of Nero (Trials of Apollo, Book Five)

By Rick Riordan

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The fifth and final installment of the #1 New York Times bestselling Trials of Apollo series has Lester and Meg returning to where it all began: Camp Half-Blood.At last, the breathtaking, action-pa...

The Lightning Thief

By Jose Villar, Rick Riordan, Attila Futaki

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The Sea Of Monsters

By Tamas Gaspar, Rick Riordan, Attila Futaki

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The Lost Hero

By Rick Riordan

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El Mar de los monstruos

By Rick Riordan

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"Desde que sabe que es hijo de un dios y una mortal, Percy Jackson espera que el destino le depare continuas aventuras. Y su expectativa se cumplirá con creces. Aunque el nuevo curso en la Escuela...

El Heroe Perdido

By Rick Riordan

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The Mark Of Athena

By Rick Riordan

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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.