Greg Ptacek Books

A biography of the doctor who, along with other achievements, was among the first to act on the idea that preventative medicine and health care for children is a function of government.

Patently Female

By Ethlie Ann Vare, Greg Ptacek

Average: 0.00, 0 Ratings

Women inventors & their discoveries

By Ethlie Ann Vare

Average: 0.00, 0 Ratings

Surveys the lives and work of such innovative women as Grace Hopper, Fannie Farmer, C. J. Walker, and Stephanie Kwolek.

Patently Female

By Ethlie Ann Vare, Greg Ptacek

Average: 0.00, 0 Ratings

Super quot T quot

By Joshua Shackman, Greg Ptacek, Karlis Ullis

Average: 0.00, 0 Ratings

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.