Howard Markel Books

Quarantine!

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In 1892, a record-breaking year for immigration to the United States, New York City was struck by two devastating epidemics: typhus fever and cholera. The typhus epidemic was traced to one particul...

Quarantine

By Howard Markel

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An Anatomy of Addiction

By Howard Markel

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Acclaimed medical historian Howard Markel traces the careers of two brilliant young doctors—Sigmund Freud, neurologist, and William Halsted, surgeon—showing how their powerful addiction...

The Secret of Life

By Howard Markel

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El secreto de la vida

By Howard Markel, Jose C. Vales

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Literatim

By Howard Markel

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History of the National Academy of Medicine

By Laura Harbold DeStefano, Rosemary Stevens, Howard Markel, David Rosner, Evelynn Maxine Hammonds

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The Kelloggs

By Howard Markel

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"From the much admired medical historian ... and author ..., the story of America's empire builders: John and Will Kellogg. John Harvey Kellogg was one of America's most beloved physicians; a best-...

Formative Years

By Alexandra Minna Stern, Howard Markel

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Bedside Manner

By Howard Markel

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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.