Rhoald Marcellius Books

Contest of Champions Vol. 2

By Marvel Comics, Al Ewing, Rhoald Marcellius

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Bonehead Vol. 1

By Bryan Hill, Rhoald Marcellius

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A1 Presents: Carpe Diem Book One: I Hate Mondays

By WH Rauf

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The GREATEST Assassins the World will Never Know! The world's seven deadliest assassins, one for each day of the week. Five impossibly hilarious missions. Death to Monday!

Sea of Thieves

By Written By Jeremy Whitley

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A gripping, uproarious, and humorous epic pirate adventure!Follow a crew of adventuring pirates as they sail the Sea of Thieves! Voyaging to far islands in search of legendary buried treasure, our...

The Official Sea of Thieves Coloring Book

By Written By Titan

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Presenting the first official coloring book from the BAFTA award-winning videogame, a bounty of nautical coloring and activity pages so that you too can be more pirate!Sink into the Sea of Thieves...

Sea of Thieves: Sea Dog's Search

By Written By Jeremy Whitley

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Pirate Captain Lesedi Singh returns to the page on a daring adventure that spans the Sea of Thieves and down to the sinister Sirens’ lair in this graphic novel set in the eponymous swashbuckl...

Sea of Thieves: Origins Vol. 1 (Graphic Novel)

By Written By Jeremy Whitley

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Dive into the lore of the Sea of Thieves in this action-packed graphic novel.  When three unlikely travellers set sail for pirate waters, making their fortune will also make history...

Sea of Thieves: Origins: Champion of Souls (Graphic Novel)

By Written By Jeremy Whitley

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Collected in print for the first time, discover how Arthur Pendragon became the scourge of skellies everywhere in this supernatural swashbuckling adventure!Before the Blackwyche became a relic in S...

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.