Orpheus Collar Books

The Red Pyramid

By Rick Riordan, Orpheus Collar

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Son of Neptune

By Rick Riordan, Disney Enterprises, Antoine Dodae, Orpheus Collar, Robert Venditti, Chris Dickey

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Serpent s Shadow

By Rick Riordan, Orpheus Collar

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The Kane Chronicles Book Three The Serpent s Shadow

By Rick Riordan, Orpheus Collar

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Kane Chronicles, The, Book Three: Serpent's Shadow: The Graphic Novel, The-Kane Chronicles, The, Book Three

By Rick Riordan

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When Apophis, the chaos snake, threatens to plunge the world into eternal darkness, siblings Carter and Sade Kane plan to use an ancient spell to destroy the snake, but first must rely on the murde...

Kane Chronicles Book Two the Throne of Fire

By Rick Riordan

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The serpent's shadow

By Rick Riordan

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Throne of Fire

By Rick Riordan

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Serpent s Shadow

By Rick Riordan

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Mark of Athena The Graphic Novel

By Rick Riordan, Orpheus Collar, Rob Venditti, Chris Dickey

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"In The Son of Neptune, Percy, Hazel, and Frank met in Camp Jupiter, the Roman equivalent of Camp Half-Blood, and traveled to the land beyond the gods to complete a dangerous quest. The third book...

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.