Kodama Naoko Books

NTR - Netsuzou Trap Vol. 4

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CAUGHT IN THE ACT! Takeda catches Hotaru and Yuma together in a compromising situation, but he’s not exactly sure what it is he saw them doing. He’s not the only one who is confused. Y...

NTR - Netsuzou Trap Vol. 5

By Kodama Naoko

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LOVE GAME Yuma said she wants to “practice” some more with Hotaru–but is that all she wants from her friend? Does Hotaru want anything to do with her? Entrance exams loom closer,...

NTR - Netsuzou Trap Vol. 6

By Kodama Naoko

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TOGETHER FOREVER? Yuma and Hotaru have been best friends and neighbors all their lives...but when they became lovers, things got a lot more complicated! Now, as Yuma tries to figure out her future...

Days of Love at Seagull Villa Vol. 1

By Kodama Naoko

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A touching yuri romance about two women building a life together in rural Japan, by the bestselling creator of I Married My Best Friend to Shut My Parents Up! When Mayumi’s fiancé leav...

Days of Love at Seagull Villa Vol. 2

By Kodama Naoko

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TROUBLE IN PARADISE After her life fell apart, Mayumi decided to ditch the city and live in the countryside. While things haven’t always gone smoothly between her and her boisterous landlady...

I Married My Best Friend to Shut My Parents Up

By Kodama Naoko

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A brand-new yuri manga about falling in love AFTER marriage! Morimoto, a young professional woman in Japan, wishes her parents would stop trying to get her to marry a man and settle down. In an un...

NTR - Netsuzou Trap is a dramatic tale of romance, lust, and betrayal, as two young woman explore their growing feelings for one another. Yuma and Hotaru have been friends since childhood. It is on...

NTR - Netsuzou Trap Vol. 2

By Kodama Naoko

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NTR - Netsuzou Trap is a dramatic tale of romance, lust, and betrayal, as two young woman explore their growing feelings for one another. With stunning artwork and a romantic storyline that oozes w...

Syrup: A Yuri Anthology Vol. 1

By Others, Milk Morinaga Kodama Naoko

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HOW SWEET IT IS! A beautiful new yuri anthology about women in love, featuring stories by some of the hottest names in manga! This short story collection explores the many different ways these wom...

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.