C. A. Roper Books

Security education, awareness, and training
The complete security handbook
The complete handbook of locks & locksmithing
The complete book of locks and locksmithing
The Complete Book of Locks Locksmithing
The Complete Book of Locks Locksmithing

By C. A. Roper

Average: 0.00, 0 Ratings

Includes information on all the newest innovations in the locksmith trade, from basic locks to special locks on vending machines, mailboxes, security systems, as well as electronic locks; how to in...

Read More
The Complete Book of Locks & Locksmithing
The Complete Book of Locks & Locksmithing

By C. A. Roper

Average: 0.00, 0 Ratings

Includes information on all the newest innovations in the locksmith trade, from basic locks to special locks on vending machines, mailboxes, security systems, as well as electronic locks; how to in...

Read More
The complete book of locks and locksmithing
The complete handbook of locks & locksmithing
The complete security handbook
Handcuffs, U.S.
Handcuffs, U.S.

By C. A. Roper

Average: 0.00, 0 Ratings

Read More

Related Articles from our Blog

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.

Read More