Luis P. Gatmaitan Books

Pangarap ni Istet, ang ambisyosong istetoskop, na makilala sa buong daigdig. Kaya gusto niyang isang Espanyol na doktor ang magmay-ari sa kaniya. Pero ano't nagustuhan siya at binili ng isang lala...

Ang Pambihirang Buhok ni Raquel

By Luis Gatmaitan

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Si Duglit

By Luis Gatmaitan

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Tutubi patrol

By Luis P. Gatmaitan

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Not all the animals on Mang Bayani's farm are happy. The animals who are sick or handicapped are excluded from participating in the games with the other healthier animals. Only Bas, the guava tree...

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.