Kalil I. Gezi Books

The mystery of the live ghosts

By Kalil I. Gezi

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Five children visit a haunted mansion on Halloween night and are confronted by the mystery of the live ghosts.

The mystery in the secret club house

By Kalil I. Gezi

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Upon entering their secret club house, five youngsters discover they have had a mysterious visitor.

The mystery of the square footprints

By Kalil I. Gezi

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While walking along the beach, five children find a set of strange, square footprints that lead them to a robot.

The mystery of the blind writer

By Kalil I. Gezi

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When a tape recorder is stolen from a blind writer, five children help him search for the thief.

The mystery at Misty Falls

By Kalil I. Gezi

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While at summer camp the five children from Maple Street solve the mystery of disappearing jewelry.

One little white shoe

By Kalil I. Gezi, Dan Siculan, Ann Bradford

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A little girl tries to find her lost shoe. The reader is invited to supply the ending.

Beebi, the little blue bell

By Kalil I. Gezi

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A little bell looks for a place to belong and be needed. The reader is invited to supply the ending.

Education in comparative and international perspectives

By Kalil I. Gezi

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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.