Hiroya Oku Books

Gantz Volume 20
Gantz Volume 20

By Hiroya Oku

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Gantz Volume 23
Gantz Volume 23

By Hiroya Oku

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Gantz Volume 33
Gantz Volume 33

By Hiroya Oku

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Gantz Volume 34
Gantz Volume 34

By Hiroya Oku

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Gantz Volume 35
Gantz Volume 35

By Hiroya Oku

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Gantz Volume 36
Gantz Volume 36

By Hiroya Oku

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Inuyashiki 2
Inuyashiki 2

By Hiroya Oku

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Cruel Youth Hiro Shishigami’s surprising reveal to his best friend, Ando, has made it clear that Inuyashiki was not the only person out in the park on that fateful night. Though it seems that...

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Inuyashiki 3
Inuyashiki 3

By Hiroya Oku

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A LIGHT IN THE DARK With his newfound powers, Inuyashiki has taken a new lease on life and has decided to help as many people as he can. But as day turns to night, the seedy underbelly of society c...

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GIGANT Vol. 8
GIGANT Vol. 8

By Hiroya Oku

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GIANT WOMAN VS. KILLER DEVILThanks to anonymous votes on the underground website E.T.E., the Earth has suffered one calamity after another. Just as popular demand requested, a gigantic, towering mo...

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GIGANT Vol. 9
GIGANT Vol. 9

By Hiroya Oku

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CLASH OF THE TITANSTogether with a squad of time-traveling warriors, Papico faces off against the dreadful monster the world knows as “Satan.” Created as the result of a perverse public...

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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.

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