Threadgold Books

The Ultrastructure Of The Animal Cell

By L. T. Threadgold, Threadgold, L. T., L. T. Threadgold And G. A. Kerkut (Auth.)

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The Ultrastructure of the Animal Cell examines the ultrastructure of the animal cell, with emphasis on the chemical, biochemical, and physiological aspects of the cell. Discussions are organized ar...

Dry Flies

By L. T. Threadgold, Threadgold

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This innovative book explains a whole new fly-tying system, devised by the author. The pattern is easy to tie and attractive to trout under a wide range of conditions.

My Little Riddle-O-Pedia Of Science And Technology

By Threadgold, Cheryl Threadgold

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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.