Mark Crilley Books

Akiko and the Intergalactic Zoo

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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.

Fifth-grader Akiko renews her acquaintance with her friends from the planet Smoo when they whisk her away to the Zarga Baffa Training Camp, where she must deal with mud, misery, and a training mast...

Akiko

By Mark Crilley

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Sixth-grader Akiko and her friends from the planet Smoo travel to the upside-down city of Gollarondo where an accident befalls Gax the robot and a search begins for all his missing pieces.

Akiko and the missing Misp

By Mark Crilley

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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.

Creatch Battler

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.

Rogmasher Rampage

By Mark Crilley

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Billy's double life--elementary school in Piffling, Indiana, and international monster killer--intensifies as he makes his first solo creatch op in a Chinese mountain village.

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.

Billy Clikk

By Mark Crilley

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Billy's double life--elementary school in Piffling, Indiana, and international monster killer--intensifies as he makes his first solo creatch op in a Chinese mountain village.

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.