Mark Crilley Books

Akiko and the missing Misp

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Sixth-grader Akiko makes another visit to the planet Smoo, but on the way she passes through a time warp that sends her back twenty-five years.

From the best-selling artist and YouTube art instructor, this book features step-by-step lessons that show you how to draw professional-quality portraits, landscapes, travel sketches, and animals u...

Akiko on the Planet Smoo

By Mark Crilley

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When fourth grader Akiko finds a spacecraft hovering outside her window one night, she begins the adventure of a lifetime. She is whisked off to the planet Smoo to lead a team searching for the Kin...

Akiko in the Sprubly Islands

By Mark Crilley

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Ten-year-old Akiko and her newly made friends survive a skugbits storm, crash in the Moonguzzit Sea, and are captured by the army of Queen Pwip as they continue their mission to rescue the son of t...

Akiko and the Great Wall of Trudd

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.

Akiko and the intergalactic zoo

By Mark Crilley

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Fifth-grader Akiko's old friends from the planet Smoo return to Earth to take her to see an intergalactic zoo, where she has a harrowing adventure with a winged Zullziban girl.

Akiko and the Alpha Centauri 5000

By Mark Crilley

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Akiko's spaceship race from one side of the galaxy to the other is complicated when Spuckler discovers that an old rival of his is also competing. Akiko and her crew-Spuckler Boach, Mr. Beeba, Poog...

Akiko

By Mark Crilley

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Akiko

By Mark Crilley

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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.