Thomas Paul MD Books

The addiction spectrum

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"Opiate addiction is the single greatest public health crisis facing Americans--it affects over 2 million people and kills 115 of them every single day. Drug overdose is now the leading cause of de...

The Vaccine-Friendly Plan

By Paul Thomas M.D., Jennifer Margulis Ph.D.

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An accessible and reassuring guide to childhood health and immunity from a pediatrician who’s both knowledgeable about the latest scientific research and respectful of a family’s risk f...

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.