Mark Crilley Books

Menace of Alia Rellapor Akiko Sagebrush

By Mark Crilley

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Akiko and the Intergalactic Zoo

By Mark Crilley

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Miki Falls

By Mark Crilley

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When Miki Yoshida meets Hiro Sakurai, she is unnerved by how much she cares about him and is determined to break down his defenses to find out the dangerous secret that he is hiding.

Akiko and the Alpha Centauri 5000

By Mark Crilley

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Akiko in the Castle of Alia Rellapor

By Mark Crilley

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Akiko and her friends reach the final stage of their mission to rescue Prince Froptoppit from the castle of Alia Rellapor.

Billy Clikk

By Mark Crilley

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Twelve-year-old Billy discovers that his parents' extermination business is really a cover for something a whole lot more sinister.

The Story Tree

By Mark Crilley

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Contains four self-contained stories from the Story Tree issues about Akiko's friends from the Planet Smoo.

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.