Rick Riordan Books

The lightning thief

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Percy Jackson is about to be kicked out of boarding school...again. And that's the least of his troubles. Lately, mythological monsters and the gods of Mount Olympus seem to be walking straight out...

Percy Jackson and the Olympians the Percy Jackson Coloring Book

By Rick Riordan, Keith Robinson

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The Serpent s Shadow

By Katherine Kellgren, Rick Riordan, Kevin R. Free

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The Throne of Fire

By Katherine Kellgren, Rick Riordan

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Rick Riordan s The Kane Chronicles

By Katherine Kellgren, Rick Riordan, Kevin R. Free

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The ship of the dead

By Rick Riordan

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Loki is readying Naglfar, the Ship of the Dead, complete with a host of giants and zombies, to begin the final battle of Ragnarok. It's up to Magnus and his friends to stop him.

The Trials of Apollo, Book Two: The Dark Prophecy

By Rick Riordan

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Zeus has punished his son Apollo--god of the sun, music, archery, poetry, and more--by casting him down to earth in the form of a gawky, acne-covered sixteen-year-old mortal named Lester. The only...

Piramide Roja

By Rick Riordan

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Red Pyramid

By Rick Riordan, Orpheus Collar

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Tower of Nero

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.